libs/ardour/session_state.cc

   1 /*
   2   Copyright (C) 1999-2013 Paul Davis
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8
   9   This program is distributed in the hope that it will be useful,
  10   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12   GNU General Public License for more details.
  13
  14   You should have received a copy of the GNU General Public License
  15   along with this program; if not, write to the Free Software
  16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20
  21 #ifdef WAF_BUILD
  22 #include "libardour-config.h"
  23 #endif
  24
  25 #include <stdint.h>
  26
  27 #include <algorithm>
  28 #include <string>
  29 #include <cerrno>
  30 #include <cstdio> /* snprintf(3) ... grrr */
  31 #include <cmath>
  32
  33 #include <unistd.h>
  34 #include <climits>
  35 #include <signal.h>
  36 #include <sys/time.h>
  37
  38 #ifdef HAVE_SYS_VFS_H
  39 #include <sys/vfs.h>
  40 #endif
  41
  42 #if defined(__APPLE__) || defined(__FreeBSD__)
  43 #include <sys/param.h>
  44 #include <sys/mount.h>
  45 #endif
  46
  47 #ifdef HAVE_SYS_STATVFS_H
  48 #include <sys/statvfs.h>
  49 #endif
  50
  51 #include <glib.h>
  52 #include "pbd/gstdio_compat.h"
  53
  54 #include <glibmm.h>
  55 #include <glibmm/threads.h>
  56 #include <glibmm/fileutils.h>
  57
  58 #include <boost/algorithm/string.hpp>
  59
  60 #include "midi++/mmc.h"
  61 #include "midi++/port.h"
  62
  63 #include "evoral/SMF.hpp"
  64
  65 #include "pbd/basename.h"
  66 #include "pbd/debug.h"
  67 #include "pbd/enumwriter.h"
  68 #include "pbd/error.h"
  69 #include "pbd/file_archive.h"
  70 #include "pbd/file_utils.h"
  71 #include "pbd/pathexpand.h"
  72 #include "pbd/pthread_utils.h"
  73 #include "pbd/stacktrace.h"
  74 #include "pbd/convert.h"
  75 #include "pbd/localtime_r.h"
  76 #include "pbd/unwind.h"
  77
  78 #include "ardour/amp.h"
  79 #include "ardour/async_midi_port.h"
  80 #include "ardour/audio_diskstream.h"
  81 #include "ardour/audio_track.h"
  82 #include "ardour/audioengine.h"
  83 #include "ardour/audiofilesource.h"
  84 #include "ardour/audioregion.h"
  85 #include "ardour/auditioner.h"
  86 #include "ardour/automation_control.h"
  87 #include "ardour/boost_debug.h"
  88 #include "ardour/butler.h"
  89 #include "ardour/controllable_descriptor.h"
  90 #include "ardour/control_protocol_manager.h"
  91 #include "ardour/directory_names.h"
  92 #include "ardour/filename_extensions.h"
  93 #include "ardour/graph.h"
  94 #include "ardour/location.h"
  95 #ifdef LV2_SUPPORT
  96 #include "ardour/lv2_plugin.h"
  97 #endif
  98 #include "ardour/midi_model.h"
  99 #include "ardour/midi_patch_manager.h"
 100 #include "ardour/midi_region.h"
 101 #include "ardour/midi_scene_changer.h"
 102 #include "ardour/midi_source.h"
 103 #include "ardour/midi_track.h"
 104 #include "ardour/pannable.h"
 105 #include "ardour/playlist_factory.h"
 106 #include "ardour/playlist_source.h"
 107 #include "ardour/port.h"
 108 #include "ardour/processor.h"
 109 #include "ardour/progress.h"
 110 #include "ardour/profile.h"
 111 #include "ardour/proxy_controllable.h"
 112 #include "ardour/recent_sessions.h"
 113 #include "ardour/region_factory.h"
 114 #include "ardour/revision.h"
 115 #include "ardour/route_group.h"
 116 #include "ardour/send.h"
 117 #include "ardour/session.h"
 118 #include "ardour/session_directory.h"
 119 #include "ardour/session_metadata.h"
 120 #include "ardour/session_playlists.h"
 121 #include "ardour/session_state_utils.h"
 122 #include "ardour/silentfilesource.h"
 123 #include "ardour/sndfilesource.h"
 124 #include "ardour/source_factory.h"
 125 #include "ardour/speakers.h"
 126 #include "ardour/template_utils.h"
 127 #include "ardour/tempo.h"
 128 #include "ardour/ticker.h"
 129 #include "ardour/user_bundle.h"
 130 #include "ardour/vca.h"
 131 #include "ardour/vca_manager.h"
 132
 133 #include "control_protocol/control_protocol.h"
 134
 135 #include "LuaBridge/LuaBridge.h"
 136
 137 #include "pbd/i18n.h"
 138 #include <locale.h>
 139
 140 using namespace std;
 141 using namespace ARDOUR;
 142 using namespace PBD;
 143
 144 #define DEBUG_UNDO_HISTORY(msg) DEBUG_TRACE (PBD::DEBUG::UndoHistory, string_compose ("%1: %2\n", __LINE__, msg));
 145
 146 void
 147 Session::pre_engine_init (string fullpath)
 148 {
 149         if (fullpath.empty()) {
 150                 destroy ();
 151                 throw failed_constructor();
 152         }
 153
 154         /* discover canonical fullpath */
 155
 156         _path = canonical_path(fullpath);
 157
 158         /* is it new ? */
 159         if (Profile->get_trx() ) {
 160                 // Waves TracksLive has a usecase of session replacement with a new one.
 161                 // We should check session state file (<session_name>.ardour) existance
 162                 // to determine if the session is new or not
 163
 164                 string full_session_name = Glib::build_filename( fullpath, _name );
 165                 full_session_name += statefile_suffix;
 166
 167                 _is_new = !Glib::file_test (full_session_name, Glib::FileTest (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR));
 168         } else {
 169                 _is_new = !Glib::file_test (_path, Glib::FileTest (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR));
 170         }
 171
 172         /* finish initialization that can't be done in a normal C++ constructor
 173            definition.
 174         */
 175
 176         timerclear (&last_mmc_step);
 177         g_atomic_int_set (&processing_prohibited, 0);
 178         g_atomic_int_set (&_record_status, Disabled);
 179         g_atomic_int_set (&_playback_load, 100);
 180         g_atomic_int_set (&_capture_load, 100);
 181         set_next_event ();
 182         _all_route_group->set_active (true, this);
 183         interpolation.add_channel_to (0, 0);
 184
 185         if (config.get_use_video_sync()) {
 186                 waiting_for_sync_offset = true;
 187         } else {
 188                 waiting_for_sync_offset = false;
 189         }
 190
 191         last_rr_session_dir = session_dirs.begin();
 192
 193         set_history_depth (Config->get_history_depth());
 194
 195         /* default: assume simple stereo speaker configuration */
 196
 197         _speakers->setup_default_speakers (2);
 198
 199         _solo_cut_control.reset (new ProxyControllable (_("solo cut control (dB)"), PBD::Controllable::GainLike,
 200                                                         boost::bind (&RCConfiguration::set_solo_mute_gain, Config, _1),
 201                                                         boost::bind (&RCConfiguration::get_solo_mute_gain, Config)));
 202         add_controllable (_solo_cut_control);
 203
 204         /* These are all static "per-class" signals */
 205
 206         SourceFactory::SourceCreated.connect_same_thread (*this, boost::bind (&Session::add_source, this, _1));
 207         PlaylistFactory::PlaylistCreated.connect_same_thread (*this, boost::bind (&Session::add_playlist, this, _1, _2));
 208         AutomationList::AutomationListCreated.connect_same_thread (*this, boost::bind (&Session::add_automation_list, this, _1));
 209         Controllable::Destroyed.connect_same_thread (*this, boost::bind (&Session::remove_controllable, this, _1));
 210         IO::PortCountChanged.connect_same_thread (*this, boost::bind (&Session::ensure_buffers, this, _1));
 211
 212         /* stop IO objects from doing stuff until we're ready for them */
 213
 214         Delivery::disable_panners ();
 215         IO::disable_connecting ();
 216 }
 217
 218 int
 219 Session::post_engine_init ()
 220 {
 221         BootMessage (_("Set block size and sample rate"));
 222
 223         set_block_size (_engine.samples_per_cycle());
 224         set_frame_rate (_engine.sample_rate());
 225
 226         BootMessage (_("Using configuration"));
 227
 228         _midi_ports = new MidiPortManager;
 229
 230         MIDISceneChanger* msc;
 231
 232         _scene_changer = msc = new MIDISceneChanger (*this);
 233         msc->set_input_port (boost::dynamic_pointer_cast<MidiPort>(scene_input_port()));
 234         msc->set_output_port (boost::dynamic_pointer_cast<MidiPort>(scene_output_port()));
 235
 236         boost::function<framecnt_t(void)> timer_func (boost::bind (&Session::audible_frame, this));
 237         boost::dynamic_pointer_cast<AsyncMIDIPort>(scene_input_port())->set_timer (timer_func);
 238
 239         setup_midi_machine_control ();
 240
 241         if (_butler->start_thread()) {
 242                 error << _("Butler did not start") << endmsg;
 243                 return -1;
 244         }
 245
 246         if (start_midi_thread ()) {
 247                 error << _("MIDI I/O thread did not start") << endmsg;
 248                 return -1;
 249         }
 250
 251         setup_click_sounds (0);
 252         setup_midi_control ();
 253
 254         _engine.Halted.connect_same_thread (*this, boost::bind (&Session::engine_halted, this));
 255         _engine.Xrun.connect_same_thread (*this, boost::bind (&Session::xrun_recovery, this));
 256
 257         try {
 258                 /* tempo map requires sample rate knowledge */
 259
 260                 delete _tempo_map;
 261                 _tempo_map = new TempoMap (_current_frame_rate);
 262                 _tempo_map->PropertyChanged.connect_same_thread (*this, boost::bind (&Session::tempo_map_changed, this, _1));
 263                 _tempo_map->MetricPositionChanged.connect_same_thread (*this, boost::bind (&Session::tempo_map_changed, this, _1));
 264
 265                 /* MidiClock requires a tempo map */
 266
 267                 delete midi_clock;
 268                 midi_clock = new MidiClockTicker ();
 269                 midi_clock->set_session (this);
 270
 271                 /* crossfades require sample rate knowledge */
 272
 273                 SndFileSource::setup_standard_crossfades (*this, frame_rate());
 274                 _engine.GraphReordered.connect_same_thread (*this, boost::bind (&Session::graph_reordered, this));
 275                 _engine.MidiSelectionPortsChanged.connect_same_thread (*this, boost::bind (&Session::rewire_midi_selection_ports, this));
 276
 277                 AudioDiskstream::allocate_working_buffers();
 278                 refresh_disk_space ();
 279
 280                 /* we're finally ready to call set_state() ... all objects have
 281                  * been created, the engine is running.
 282                  */
 283
 284                 if (state_tree) {
 285                         if (set_state (*state_tree->root(), Stateful::loading_state_version)) {
 286                                 error << _("Could not set session state from XML") << endmsg;
 287                                 return -1;
 288                         }
 289                 } else {
 290                         // set_state() will call setup_raid_path(), but if it's a new session we need
 291                         // to call setup_raid_path() here.
 292                         setup_raid_path (_path);
 293                 }
 294
 295                 /* ENGINE */
 296
 297                 boost::function<void (std::string)> ff (boost::bind (&Session::config_changed, this, _1, false));
 298                 boost::function<void (std::string)> ft (boost::bind (&Session::config_changed, this, _1, true));
 299
 300                 Config->map_parameters (ff);
 301                 config.map_parameters (ft);
 302                 _butler->map_parameters ();
 303
 304                 /* Reset all panners */
 305
 306                 Delivery::reset_panners ();
 307
 308                 /* this will cause the CPM to instantiate any protocols that are in use
 309                  * (or mandatory), which will pass it this Session, and then call
 310                  * set_state() on each instantiated protocol to match stored state.
 311                  */
 312
 313                 ControlProtocolManager::instance().set_session (this);
 314
 315                 /* This must be done after the ControlProtocolManager set_session above,
 316                    as it will set states for ports which the ControlProtocolManager creates.
 317                 */
 318
 319                 // XXX set state of MIDI::Port's
 320                 // MidiPortManager::instance()->set_port_states (Config->midi_port_states ());
 321
 322                 /* And this must be done after the MIDI::Manager::set_port_states as
 323                  * it will try to make connections whose details are loaded by set_port_states.
 324                  */
 325
 326                 hookup_io ();
 327
 328                 /* Let control protocols know that we are now all connected, so they
 329                  * could start talking to surfaces if they want to.
 330                  */
 331
 332                 ControlProtocolManager::instance().midi_connectivity_established ();
 333
 334                 if (_is_new && !no_auto_connect()) {
 335                         Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock());
 336                         auto_connect_master_bus ();
 337                 }
 338
 339                 _state_of_the_state = StateOfTheState (_state_of_the_state & ~(CannotSave|Dirty));
 340
 341                 /* update latencies */
 342
 343                 initialize_latencies ();
 344
 345                 _locations->added.connect_same_thread (*this, boost::bind (&Session::location_added, this, _1));
 346                 _locations->removed.connect_same_thread (*this, boost::bind (&Session::location_removed, this, _1));
 347                 _locations->changed.connect_same_thread (*this, boost::bind (&Session::locations_changed, this));
 348
 349         } catch (AudioEngine::PortRegistrationFailure& err) {
 350                 /* handle this one in a different way than all others, so that its clear what happened */
 351                 error << err.what() << endmsg;
 352                 return -1;
 353         } catch (std::exception const & e) {
 354                 error << _("Unexpected exception during session setup: ") << e.what() << endmsg;
 355                 return -1;
 356         } catch (...) {
 357                 error << _("Unknown exception during session setup") << endmsg;
 358                 return -1;
 359         }
 360
 361         BootMessage (_("Reset Remote Controls"));
 362
 363         // send_full_time_code (0);
 364         _engine.transport_locate (0);
 365
 366         send_immediate_mmc (MIDI::MachineControlCommand (MIDI::MachineControl::cmdMmcReset));
 367         send_immediate_mmc (MIDI::MachineControlCommand (Timecode::Time ()));
 368
 369         MIDI::Name::MidiPatchManager::instance().add_search_path (session_directory().midi_patch_path() );
 370
 371         ltc_tx_initialize();
 372         /* initial program change will be delivered later; see ::config_changed() */
 373
 374         _state_of_the_state = Clean;
 375
 376         Port::set_connecting_blocked (false);
 377
 378         DirtyChanged (); /* EMIT SIGNAL */
 379
 380         if (_is_new) {
 381                 save_state ("");
 382         } else if (state_was_pending) {
 383                 save_state ("");
 384                 remove_pending_capture_state ();
 385                 state_was_pending = false;
 386         }
 387
 388         /* Now, finally, we can fill the playback buffers */
 389
 390         BootMessage (_("Filling playback buffers"));
 391
 392         boost::shared_ptr<RouteList> rl = routes.reader();
 393         for (RouteList::iterator r = rl->begin(); r != rl->end(); ++r) {
 394                 boost::shared_ptr<Track> trk = boost::dynamic_pointer_cast<Track> (*r);
 395                 if (trk && !trk->hidden()) {
 396                         trk->seek (_transport_frame, true);
 397                 }
 398         }
 399
 400         return 0;
 401 }
 402
 403 void
 404 Session::session_loaded ()
 405 {
 406         SessionLoaded();
 407
 408         _state_of_the_state = Clean;
 409
 410         DirtyChanged (); /* EMIT SIGNAL */
 411
 412         if (_is_new) {
 413                 save_state ("");
 414         } else if (state_was_pending) {
 415                 save_state ("");
 416                 remove_pending_capture_state ();
 417                 state_was_pending = false;
 418         }
 419
 420         /* Now, finally, we can fill the playback buffers */
 421
 422         BootMessage (_("Filling playback buffers"));
 423         force_locate (_transport_frame, false);
 424 }
 425
 426 string
 427 Session::raid_path () const
 428 {
 429         Searchpath raid_search_path;
 430
 431         for (vector<space_and_path>::const_iterator i = session_dirs.begin(); i != session_dirs.end(); ++i) {
 432                 raid_search_path += (*i).path;
 433         }
 434
 435         return raid_search_path.to_string ();
 436 }
 437
 438 void
 439 Session::setup_raid_path (string path)
 440 {
 441         if (path.empty()) {
 442                 return;
 443         }
 444
 445         space_and_path sp;
 446         string fspath;
 447
 448         session_dirs.clear ();
 449
 450         Searchpath search_path(path);
 451         Searchpath sound_search_path;
 452         Searchpath midi_search_path;
 453
 454         for (Searchpath::const_iterator i = search_path.begin(); i != search_path.end(); ++i) {
 455                 sp.path = *i;
 456                 sp.blocks = 0; // not needed
 457                 session_dirs.push_back (sp);
 458
 459                 SessionDirectory sdir(sp.path);
 460
 461                 sound_search_path += sdir.sound_path ();
 462                 midi_search_path += sdir.midi_path ();
 463         }
 464
 465         // reset the round-robin soundfile path thingie
 466         last_rr_session_dir = session_dirs.begin();
 467 }
 468
 469 bool
 470 Session::path_is_within_session (const std::string& path)
 471 {
 472         for (vector<space_and_path>::const_iterator i = session_dirs.begin(); i != session_dirs.end(); ++i) {
 473                 if (PBD::path_is_within (i->path, path)) {
 474                         return true;
 475                 }
 476         }
 477         return false;
 478 }
 479
 480 int
 481 Session::ensure_subdirs ()
 482 {
 483         string dir;
 484
 485         dir = session_directory().peak_path();
 486
 487         if (g_mkdir_with_parents (dir.c_str(), 0755) < 0) {
 488                 error << string_compose(_("Session: cannot create session peakfile folder \"%1\" (%2)"), dir, strerror (errno)) << endmsg;
 489                 return -1;
 490         }
 491
 492         dir = session_directory().sound_path();
 493
 494         if (g_mkdir_with_parents (dir.c_str(), 0755) < 0) {
 495                 error << string_compose(_("Session: cannot create session sounds dir \"%1\" (%2)"), dir, strerror (errno)) << endmsg;
 496                 return -1;
 497         }
 498
 499         dir = session_directory().midi_path();
 500
 501         if (g_mkdir_with_parents (dir.c_str(), 0755) < 0) {
 502                 error << string_compose(_("Session: cannot create session midi dir \"%1\" (%2)"), dir, strerror (errno)) << endmsg;
 503                 return -1;
 504         }
 505
 506         dir = session_directory().dead_path();
 507
 508         if (g_mkdir_with_parents (dir.c_str(), 0755) < 0) {
 509                 error << string_compose(_("Session: cannot create session dead sounds folder \"%1\" (%2)"), dir, strerror (errno)) << endmsg;
 510                 return -1;
 511         }
 512
 513         dir = session_directory().export_path();
 514
 515         if (g_mkdir_with_parents (dir.c_str(), 0755) < 0) {
 516                 error << string_compose(_("Session: cannot create session export folder \"%1\" (%2)"), dir, strerror (errno)) << endmsg;
 517                 return -1;
 518         }
 519
 520         dir = analysis_dir ();
 521
 522         if (g_mkdir_with_parents (dir.c_str(), 0755) < 0) {
 523                 error << string_compose(_("Session: cannot create session analysis folder \"%1\" (%2)"), dir, strerror (errno)) << endmsg;
 524                 return -1;
 525         }
 526
 527         dir = plugins_dir ();
 528
 529         if (g_mkdir_with_parents (dir.c_str(), 0755) < 0) {
 530                 error << string_compose(_("Session: cannot create session plugins folder \"%1\" (%2)"), dir, strerror (errno)) << endmsg;
 531                 return -1;
 532         }
 533
 534         dir = externals_dir ();
 535
 536         if (g_mkdir_with_parents (dir.c_str(), 0755) < 0) {
 537                 error << string_compose(_("Session: cannot create session externals folder \"%1\" (%2)"), dir, strerror (errno)) << endmsg;
 538                 return -1;
 539         }
 540
 541         return 0;
 542 }
 543
 544 /** @param session_template directory containing session template, or empty.
 545  *  Caller must not hold process lock.
 546  */
 547 int
 548 Session::create (const string& session_template, BusProfile* bus_profile)
 549 {
 550         if (g_mkdir_with_parents (_path.c_str(), 0755) < 0) {
 551                 error << string_compose(_("Session: cannot create session folder \"%1\" (%2)"), _path, strerror (errno)) << endmsg;
 552                 return -1;
 553         }
 554
 555         if (ensure_subdirs ()) {
 556                 return -1;
 557         }
 558
 559         _writable = exists_and_writable (_path);
 560
 561         if (!session_template.empty()) {
 562                 string in_path = (ARDOUR::Profile->get_trx () ? session_template : session_template_dir_to_file (session_template));
 563
 564                 FILE* in = g_fopen (in_path.c_str(), "rb");
 565
 566                 if (in) {
 567                         /* no need to call legalize_for_path() since the string
 568                          * in session_template is already a legal path name
 569                          */
 570                         string out_path = Glib::build_filename (_session_dir->root_path(), _name + statefile_suffix);
 571
 572                         FILE* out = g_fopen (out_path.c_str(), "wb");
 573
 574                         if (out) {
 575                                 char buf[1024];
 576                                 stringstream new_session;
 577
 578                                 while (!feof (in)) {
 579                                         size_t charsRead = fread (buf, sizeof(char), 1024, in);
 580
 581                                         if (ferror (in)) {
 582                                                 error << string_compose (_("Error reading session template file %1 (%2)"), in_path, strerror (errno)) << endmsg;
 583                                                 fclose (in);
 584                                                 fclose (out);
 585                                                 return -1;
 586                                         }
 587                                         if (charsRead == 0) {
 588                                                 break;
 589                                         }
 590                                         new_session.write (buf, charsRead);
 591                                 }
 592                                 fclose (in);
 593
 594                                 string file_contents = new_session.str();
 595                                 size_t writeSize = file_contents.length();
 596                                 if (fwrite (file_contents.c_str(), sizeof(char), writeSize, out) != writeSize) {
 597                                         error << string_compose (_("Error writing session template file %1 (%2)"), out_path, strerror (errno)) << endmsg;
 598                                         fclose (out);
 599                                         return -1;
 600                                 }
 601                                 fclose (out);
 602
 603                                 _is_new = false;
 604
 605                                 if (!ARDOUR::Profile->get_trx()) {
 606                                         /* Copy plugin state files from template to new session */
 607                                         std::string template_plugins = Glib::build_filename (session_template, X_("plugins"));
 608                                         copy_recurse (template_plugins, plugins_dir ());
 609                                 }
 610
 611                                 return 0;
 612
 613                         } else {
 614                                 error << string_compose (_("Could not open %1 for writing session template"), out_path)
 615                                         << endmsg;
 616                                 fclose(in);
 617                                 return -1;
 618                         }
 619
 620                 } else {
 621                         error << string_compose (_("Could not open session template %1 for reading"), in_path)
 622                                 << endmsg;
 623                         return -1;
 624                 }
 625
 626         }
 627
 628         if (Profile->get_trx()) {
 629
 630                 /* set initial start + end point : ARDOUR::Session::session_end_shift long.
 631                    Remember that this is a brand new session. Sessions
 632                    loaded from saved state will get this range from the saved state.
 633                 */
 634
 635                 set_session_range_location (0, 0);
 636
 637                 /* Initial loop location, from absolute zero, length 10 seconds  */
 638
 639                 Location* loc = new Location (*this, 0, 10.0 * _engine.sample_rate(), _("Loop"),  Location::IsAutoLoop, 0);
 640                 _locations->add (loc, true);
 641                 set_auto_loop_location (loc);
 642         }
 643
 644         _state_of_the_state = Clean;
 645
 646         /* set up Master Out and Monitor Out if necessary */
 647
 648         if (bus_profile) {
 649
 650                 RouteList rl;
 651                 ChanCount count(DataType::AUDIO, bus_profile->master_out_channels);
 652
 653                 // Waves Tracks: always create master bus for Tracks
 654                 if (ARDOUR::Profile->get_trx() || bus_profile->master_out_channels) {
 655                         boost::shared_ptr<Route> r (new Route (*this, _("Master"), PresentationInfo::MasterOut, DataType::AUDIO));
 656                         if (r->init ()) {
 657                                 return -1;
 658                         }
 659
 660                         BOOST_MARK_ROUTE(r);
 661
 662                         {
 663                                 Glib::Threads::Mutex::Lock lm (AudioEngine::instance()->process_lock ());
 664                                 r->input()->ensure_io (count, false, this);
 665                                 r->output()->ensure_io (count, false, this);
 666                         }
 667
 668                         rl.push_back (r);
 669
 670                 } else {
 671                         /* prohibit auto-connect to master, because there isn't one */
 672                         bus_profile->output_ac = AutoConnectOption (bus_profile->output_ac & ~AutoConnectMaster);
 673                 }
 674
 675                 if (!rl.empty()) {
 676                         add_routes (rl, false, false, false, PresentationInfo::max_order);
 677                 }
 678
 679                 // Waves Tracks: Skip this. Always use autoconnection for Tracks
 680                 if (!ARDOUR::Profile->get_trx()) {
 681
 682                         /* this allows the user to override settings with an environment variable.
 683                          */
 684
 685                         if (no_auto_connect()) {
 686                                 bus_profile->input_ac = AutoConnectOption (0);
 687                                 bus_profile->output_ac = AutoConnectOption (0);
 688                         }
 689
 690                         Config->set_input_auto_connect (bus_profile->input_ac);
 691                         Config->set_output_auto_connect (bus_profile->output_ac);
 692                 }
 693         }
 694
 695         if (Config->get_use_monitor_bus() && bus_profile) {
 696                 add_monitor_section ();
 697         }
 698
 699         return 0;
 700 }
 701
 702 void
 703 Session::maybe_write_autosave()
 704 {
 705         if (dirty() && record_status() != Recording) {
 706                 save_state("", true);
 707         }
 708 }
 709
 710 void
 711 Session::remove_pending_capture_state ()
 712 {
 713         std::string pending_state_file_path(_session_dir->root_path());
 714
 715         pending_state_file_path = Glib::build_filename (pending_state_file_path, legalize_for_path (_current_snapshot_name) + pending_suffix);
 716
 717         if (!Glib::file_test (pending_state_file_path, Glib::FILE_TEST_EXISTS)) return;
 718
 719         if (g_remove (pending_state_file_path.c_str()) != 0) {
 720                 error << string_compose(_("Could not remove pending capture state at path \"%1\" (%2)"),
 721                                 pending_state_file_path, g_strerror (errno)) << endmsg;
 722         }
 723 }
 724
 725 /** Rename a state file.
 726  *  @param old_name Old snapshot name.
 727  *  @param new_name New snapshot name.
 728  */
 729 void
 730 Session::rename_state (string old_name, string new_name)
 731 {
 732         if (old_name == _current_snapshot_name || old_name == _name) {
 733                 /* refuse to rename the current snapshot or the "main" one */
 734                 return;
 735         }
 736
 737         const string old_xml_filename = legalize_for_path (old_name) + statefile_suffix;
 738         const string new_xml_filename = legalize_for_path (new_name) + statefile_suffix;
 739
 740         const std::string old_xml_path(Glib::build_filename (_session_dir->root_path(), old_xml_filename));
 741         const std::string new_xml_path(Glib::build_filename (_session_dir->root_path(), new_xml_filename));
 742
 743         if (::g_rename (old_xml_path.c_str(), new_xml_path.c_str()) != 0) {
 744                 error << string_compose(_("could not rename snapshot %1 to %2 (%3)"),
 745                                 old_name, new_name, g_strerror(errno)) << endmsg;
 746         }
 747 }
 748
 749 /** Remove a state file.
 750  *  @param snapshot_name Snapshot name.
 751  */
 752 void
 753 Session::remove_state (string snapshot_name)
 754 {
 755         if (!_writable || snapshot_name == _current_snapshot_name || snapshot_name == _name) {
 756                 // refuse to remove the current snapshot or the "main" one
 757                 return;
 758         }
 759
 760         std::string xml_path(_session_dir->root_path());
 761
 762         xml_path = Glib::build_filename (xml_path, legalize_for_path (snapshot_name) + statefile_suffix);
 763
 764         if (!create_backup_file (xml_path)) {
 765                 // don't remove it if a backup can't be made
 766                 // create_backup_file will log the error.
 767                 return;
 768         }
 769
 770         // and delete it
 771         if (g_remove (xml_path.c_str()) != 0) {
 772                 error << string_compose(_("Could not remove session file at path \"%1\" (%2)"),
 773                                 xml_path, g_strerror (errno)) << endmsg;
 774         }
 775 }
 776
 777 /** @param snapshot_name Name to save under, without .ardour / .pending prefix */
 778 int
 779 Session::save_state (string snapshot_name, bool pending, bool switch_to_snapshot, bool template_only)
 780 {
 781         DEBUG_TRACE (DEBUG::Locale, string_compose ("Session::save_state locale '%1'\n", setlocale (LC_NUMERIC, NULL)));
 782
 783         XMLTree tree;
 784         std::string xml_path(_session_dir->root_path());
 785
 786         /* prevent concurrent saves from different threads */
 787
 788         Glib::Threads::Mutex::Lock lm (save_state_lock);
 789
 790         if (!_writable || (_state_of_the_state & CannotSave)) {
 791                 return 1;
 792         }
 793
 794         if (g_atomic_int_get(&_suspend_save)) {
 795                 _save_queued = true;
 796                 return 1;
 797         }
 798         _save_queued = false;
 799
 800         if (!_engine.connected ()) {
 801                 error << string_compose (_("the %1 audio engine is not connected and state saving would lose all I/O connections. Session not saved"),
 802                                          PROGRAM_NAME)
 803                       << endmsg;
 804                 return 1;
 805         }
 806
 807 #ifndef NDEBUG
 808         const int64_t save_start_time = g_get_monotonic_time();
 809 #endif
 810
 811         /* tell sources we're saving first, in case they write out to a new file
 812          * which should be saved with the state rather than the old one */
 813         for (SourceMap::const_iterator i = sources.begin(); i != sources.end(); ++i) {
 814                 try {
 815                         i->second->session_saved();
 816                 } catch (Evoral::SMF::FileError& e) {
 817                         error << string_compose ("Could not write to MIDI file %1; MIDI data not saved.", e.file_name ()) << endmsg;
 818                 }
 819         }
 820
 821         SessionSaveUnderway (); /* EMIT SIGNAL */
 822
 823         bool mark_as_clean = true;
 824
 825         if (!snapshot_name.empty() && !switch_to_snapshot) {
 826                 mark_as_clean = false;
 827         }
 828
 829         if (template_only) {
 830                 mark_as_clean = false;
 831                 tree.set_root (&get_template());
 832         } else {
 833                 tree.set_root (&get_state());
 834         }
 835
 836         if (snapshot_name.empty()) {
 837                 snapshot_name = _current_snapshot_name;
 838         } else if (switch_to_snapshot) {
 839                 set_snapshot_name (snapshot_name);
 840         }
 841
 842         assert (!snapshot_name.empty());
 843
 844         if (!pending) {
 845
 846                 /* proper save: use statefile_suffix (.ardour in English) */
 847
 848                 xml_path = Glib::build_filename (xml_path, legalize_for_path (snapshot_name) + statefile_suffix);
 849
 850                 /* make a backup copy of the old file */
 851
 852                 if (Glib::file_test (xml_path, Glib::FILE_TEST_EXISTS) && !create_backup_file (xml_path)) {
 853                         // create_backup_file will log the error
 854                         return -1;
 855                 }
 856
 857         } else {
 858
 859                 /* pending save: use pending_suffix (.pending in English) */
 860                 xml_path = Glib::build_filename (xml_path, legalize_for_path (snapshot_name) + pending_suffix);
 861         }
 862
 863         std::string tmp_path(_session_dir->root_path());
 864         tmp_path = Glib::build_filename (tmp_path, legalize_for_path (snapshot_name) + temp_suffix);
 865
 866         cerr << "actually writing state to " << tmp_path << endl;
 867
 868         if (!tree.write (tmp_path)) {
 869                 error << string_compose (_("state could not be saved to %1"), tmp_path) << endmsg;
 870                 if (g_remove (tmp_path.c_str()) != 0) {
 871                         error << string_compose(_("Could not remove temporary session file at path \"%1\" (%2)"),
 872                                         tmp_path, g_strerror (errno)) << endmsg;
 873                 }
 874                 return -1;
 875
 876         } else {
 877
 878                 cerr << "renaming state to " << xml_path << endl;
 879
 880                 if (::g_rename (tmp_path.c_str(), xml_path.c_str()) != 0) {
 881                         error << string_compose (_("could not rename temporary session file %1 to %2 (%3)"),
 882                                         tmp_path, xml_path, g_strerror(errno)) << endmsg;
 883                         if (g_remove (tmp_path.c_str()) != 0) {
 884                                 error << string_compose(_("Could not remove temporary session file at path \"%1\" (%2)"),
 885                                                 tmp_path, g_strerror (errno)) << endmsg;
 886                         }
 887                         return -1;
 888                 }
 889         }
 890
 891         if (!pending) {
 892
 893                 save_history (snapshot_name);
 894
 895                 if (mark_as_clean) {
 896                         bool was_dirty = dirty();
 897
 898                         _state_of_the_state = StateOfTheState (_state_of_the_state & ~Dirty);
 899
 900                         if (was_dirty) {
 901                                 DirtyChanged (); /* EMIT SIGNAL */
 902                         }
 903                 }
 904
 905                 StateSaved (snapshot_name); /* EMIT SIGNAL */
 906         }
 907
 908 #ifndef NDEBUG
 909         const int64_t elapsed_time_us = g_get_monotonic_time() - save_start_time;
 910         cerr << "saved state in " << fixed << setprecision (1) << elapsed_time_us / 1000. << " ms\n";
 911 #endif
 912         return 0;
 913 }
 914
 915 int
 916 Session::restore_state (string snapshot_name)
 917 {
 918         if (load_state (snapshot_name) == 0) {
 919                 set_state (*state_tree->root(), Stateful::loading_state_version);
 920         }
 921
 922         return 0;
 923 }
 924
 925 int
 926 Session::load_state (string snapshot_name)
 927 {
 928         delete state_tree;
 929         state_tree = 0;
 930
 931         state_was_pending = false;
 932
 933         /* check for leftover pending state from a crashed capture attempt */
 934
 935         std::string xmlpath(_session_dir->root_path());
 936         xmlpath = Glib::build_filename (xmlpath, legalize_for_path (snapshot_name) + pending_suffix);
 937
 938         if (Glib::file_test (xmlpath, Glib::FILE_TEST_EXISTS)) {
 939
 940                 /* there is pending state from a crashed capture attempt */
 941
 942                 boost::optional<int> r = AskAboutPendingState();
 943                 if (r.get_value_or (1)) {
 944                         state_was_pending = true;
 945                 }
 946         }
 947
 948         if (!state_was_pending) {
 949                 xmlpath = Glib::build_filename (_session_dir->root_path(), snapshot_name);
 950         }
 951
 952         if (!Glib::file_test (xmlpath, Glib::FILE_TEST_EXISTS)) {
 953                 xmlpath = Glib::build_filename (_session_dir->root_path(), legalize_for_path (snapshot_name) + statefile_suffix);
 954                 if (!Glib::file_test (xmlpath, Glib::FILE_TEST_EXISTS)) {
 955                         error << string_compose(_("%1: session file \"%2\" doesn't exist!"), _name, xmlpath) << endmsg;
 956                         return 1;
 957                 }
 958         }
 959
 960         state_tree = new XMLTree;
 961
 962         set_dirty();
 963
 964         _writable = exists_and_writable (xmlpath) && exists_and_writable(Glib::path_get_dirname(xmlpath));
 965
 966         if (!state_tree->read (xmlpath)) {
 967                 error << string_compose(_("Could not understand session file %1"), xmlpath) << endmsg;
 968                 delete state_tree;
 969                 state_tree = 0;
 970                 return -1;
 971         }
 972
 973         XMLNode const & root (*state_tree->root());
 974
 975         if (root.name() != X_("Session")) {
 976                 error << string_compose (_("Session file %1 is not a session"), xmlpath) << endmsg;
 977                 delete state_tree;
 978                 state_tree = 0;
 979                 return -1;
 980         }
 981
 982         XMLProperty const * prop;
 983
 984         if ((prop = root.property ("version")) == 0) {
 985                 /* no version implies very old version of Ardour */
 986                 Stateful::loading_state_version = 1000;
 987         } else {
 988                 if (prop->value().find ('.') != string::npos) {
 989                         /* old school version format */
 990                         if (prop->value()[0] == '2') {
 991                                 Stateful::loading_state_version = 2000;
 992                         } else {
 993                                 Stateful::loading_state_version = 3000;
 994                         }
 995                 } else {
 996                         Stateful::loading_state_version = atoi (prop->value());
 997                 }
 998         }
 999
1000         if (Stateful::loading_state_version < CURRENT_SESSION_FILE_VERSION && _writable) {
1001
1002                 std::string backup_path(_session_dir->root_path());
1003                 std::string backup_filename = string_compose ("%1-%2%3", legalize_for_path (snapshot_name), Stateful::loading_state_version, statefile_suffix);
1004                 backup_path = Glib::build_filename (backup_path, backup_filename);
1005
1006                 // only create a backup for a given statefile version once
1007
1008                 if (!Glib::file_test (backup_path, Glib::FILE_TEST_EXISTS)) {
1009
1010                         VersionMismatch (xmlpath, backup_path);
1011
1012                         if (!copy_file (xmlpath, backup_path)) {;
1013                                 return -1;
1014                         }
1015                 }
1016         }
1017
1018         save_snapshot_name (snapshot_name);
1019
1020         return 0;
1021 }
1022
1023 int
1024 Session::load_options (const XMLNode& node)
1025 {
1026         LocaleGuard lg;
1027         config.set_variables (node);
1028         return 0;
1029 }
1030
1031 bool
1032 Session::save_default_options ()
1033 {
1034         return config.save_state();
1035 }
1036
1037 XMLNode&
1038 Session::get_state()
1039 {
1040         return state(true);
1041 }
1042
1043 XMLNode&
1044 Session::get_template()
1045 {
1046         /* if we don't disable rec-enable, diskstreams
1047            will believe they need to store their capture
1048            sources in their state node.
1049         */
1050
1051         disable_record (false);
1052
1053         return state(false);
1054 }
1055
1056 typedef std::set<boost::shared_ptr<Playlist> > PlaylistSet;
1057 typedef std::set<boost::shared_ptr<Source> > SourceSet;
1058
1059 bool
1060 Session::export_track_state (boost::shared_ptr<RouteList> rl, const string& path)
1061 {
1062         if (Glib::file_test (path, Glib::FILE_TEST_EXISTS))  {
1063                 return false;
1064         }
1065         if (g_mkdir_with_parents (path.c_str(), 0755) != 0) {
1066                 return false;
1067         }
1068
1069         PBD::Unwinder<std::string> uw (_template_state_dir, path);
1070
1071         LocaleGuard lg;
1072         XMLNode* node = new XMLNode("TrackState"); // XXX
1073         XMLNode* child;
1074
1075         PlaylistSet playlists; // SessionPlaylists
1076         SourceSet sources;
1077
1078         // these will work with  new_route_from_template()
1079         // TODO: LV2 plugin-state-dir needs to be relative (on load?)
1080         child = node->add_child ("Routes");
1081         for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
1082                 if ((*i)->is_auditioner()) {
1083                         continue;
1084                 }
1085                 if ((*i)->is_master() || (*i)->is_monitor()) {
1086                         continue;
1087                 }
1088                 child->add_child_nocopy ((*i)->get_state());
1089                 boost::shared_ptr<Track> track = boost::dynamic_pointer_cast<Track> (*i);
1090                 if (track) {
1091                         playlists.insert (track->playlist ());
1092                 }
1093         }
1094
1095         // on load, Regions in the playlists need to resolve and map Source-IDs
1096         // also playlist needs to be merged or created with new-name..
1097         // ... and Diskstream in tracks adjusted to use the correct playlist
1098         child = node->add_child ("Playlists"); // SessionPlaylists::add_state
1099         for (PlaylistSet::const_iterator i = playlists.begin(); i != playlists.end(); ++i) {
1100                 child->add_child_nocopy ((*i)->get_state ());
1101                 boost::shared_ptr<RegionList> prl = (*i)->region_list ();
1102                 for (RegionList::const_iterator s = prl->begin(); s != prl->end(); ++s) {
1103                         const Region::SourceList& sl = (*s)->sources ();
1104                         for (Region::SourceList::const_iterator sli = sl.begin(); sli != sl.end(); ++sli) {
1105                                 sources.insert (*sli);
1106                         }
1107                 }
1108         }
1109
1110         child = node->add_child ("Sources");
1111         for (SourceSet::const_iterator i = sources.begin(); i != sources.end(); ++i) {
1112                 child->add_child_nocopy ((*i)->get_state ());
1113                 boost::shared_ptr<FileSource> fs = boost::dynamic_pointer_cast<FileSource> (*i);
1114                 if (fs) {
1115 #ifdef PLATFORM_WINDOWS
1116                         fs->close ();
1117 #endif
1118                         string p = fs->path ();
1119                         PBD::copy_file (p, Glib::build_filename (path, Glib::path_get_basename (p)));
1120                 }
1121         }
1122
1123         std::string sn = Glib::build_filename (path, "share.axml");
1124
1125         XMLTree tree;
1126         tree.set_root (node);
1127         return tree.write (sn.c_str());
1128 }
1129
1130 XMLNode&
1131 Session::state (bool full_state)
1132 {
1133         LocaleGuard lg;
1134         XMLNode* node = new XMLNode("Session");
1135         XMLNode* child;
1136
1137         char buf[16];
1138         snprintf(buf, sizeof(buf), "%d", CURRENT_SESSION_FILE_VERSION);
1139         node->add_property("version", buf);
1140
1141         child = node->add_child ("ProgramVersion");
1142         child->add_property("created-with", created_with);
1143
1144         std::string modified_with = string_compose ("%1 %2", PROGRAM_NAME, revision);
1145         child->add_property("modified-with", modified_with);
1146
1147         /* store configuration settings */
1148
1149         if (full_state) {
1150
1151                 node->add_property ("name", _name);
1152                 snprintf (buf, sizeof (buf), "%" PRId64, _base_frame_rate);
1153                 node->add_property ("sample-rate", buf);
1154
1155                 if (session_dirs.size() > 1) {
1156
1157                         string p;
1158
1159                         vector<space_and_path>::iterator i = session_dirs.begin();
1160                         vector<space_and_path>::iterator next;
1161
1162                         ++i; /* skip the first one */
1163                         next = i;
1164                         ++next;
1165
1166                         while (i != session_dirs.end()) {
1167
1168                                 p += (*i).path;
1169
1170                                 if (next != session_dirs.end()) {
1171                                         p += G_SEARCHPATH_SEPARATOR;
1172                                 } else {
1173                                         break;
1174                                 }
1175
1176                                 ++next;
1177                                 ++i;
1178                         }
1179
1180                         child = node->add_child ("Path");
1181                         child->add_content (p);
1182                 }
1183         }
1184
1185         node->add_property ("end-is-free", _session_range_end_is_free ? X_("yes") : X_("no"));
1186
1187         /* save the ID counter */
1188
1189         snprintf (buf, sizeof (buf), "%" PRIu64, ID::counter());
1190         node->add_property ("id-counter", buf);
1191
1192         snprintf (buf, sizeof (buf), "%u", name_id_counter ());
1193         node->add_property ("name-counter", buf);
1194
1195         /* save the event ID counter */
1196
1197         snprintf (buf, sizeof (buf), "%d", Evoral::event_id_counter());
1198         node->add_property ("event-counter", buf);
1199
1200         /* save the VCA counter */
1201
1202         snprintf (buf, sizeof (buf), "%" PRIu32, VCA::get_next_vca_number());
1203         node->add_property ("vca-counter", buf);
1204
1205         /* various options */
1206
1207         list<XMLNode*> midi_port_nodes = _midi_ports->get_midi_port_states();
1208         if (!midi_port_nodes.empty()) {
1209                 XMLNode* midi_port_stuff = new XMLNode ("MIDIPorts");
1210                 for (list<XMLNode*>::const_iterator n = midi_port_nodes.begin(); n != midi_port_nodes.end(); ++n) {
1211                         midi_port_stuff->add_child_nocopy (**n);
1212                 }
1213                 node->add_child_nocopy (*midi_port_stuff);
1214         }
1215
1216         XMLNode& cfgxml (config.get_variables ());
1217         if (!full_state) {
1218                 /* exclude search-paths from template */
1219                 cfgxml.remove_nodes_and_delete ("name", "audio-search-path");
1220                 cfgxml.remove_nodes_and_delete ("name", "midi-search-path");
1221                 cfgxml.remove_nodes_and_delete ("name", "raid-path");
1222         }
1223         node->add_child_nocopy (cfgxml);
1224
1225         node->add_child_nocopy (ARDOUR::SessionMetadata::Metadata()->get_state());
1226
1227         child = node->add_child ("Sources");
1228
1229         if (full_state) {
1230                 Glib::Threads::Mutex::Lock sl (source_lock);
1231
1232                 for (SourceMap::iterator siter = sources.begin(); siter != sources.end(); ++siter) {
1233
1234                         /* Don't save information about non-file Sources, or
1235                          * about non-destructive file sources that are empty
1236                          * and unused by any regions.
1237                         */
1238
1239                         boost::shared_ptr<FileSource> fs;
1240
1241                         if ((fs = boost::dynamic_pointer_cast<FileSource> (siter->second)) != 0) {
1242
1243                                 if (!fs->destructive()) {
1244                                         if (fs->empty() && !fs->used()) {
1245                                                 continue;
1246                                         }
1247                                 }
1248
1249                                 child->add_child_nocopy (siter->second->get_state());
1250                         }
1251                 }
1252         }
1253
1254         child = node->add_child ("Regions");
1255
1256         if (full_state) {
1257                 Glib::Threads::Mutex::Lock rl (region_lock);
1258                 const RegionFactory::RegionMap& region_map (RegionFactory::all_regions());
1259                 for (RegionFactory::RegionMap::const_iterator i = region_map.begin(); i != region_map.end(); ++i) {
1260                         boost::shared_ptr<Region> r = i->second;
1261                         /* only store regions not attached to playlists */
1262                         if (r->playlist() == 0) {
1263                                 if (boost::dynamic_pointer_cast<AudioRegion>(r)) {
1264                                         child->add_child_nocopy ((boost::dynamic_pointer_cast<AudioRegion>(r))->get_basic_state ());
1265                                 } else {
1266                                         child->add_child_nocopy (r->get_state ());
1267                                 }
1268                         }
1269                 }
1270
1271                 RegionFactory::CompoundAssociations& cassocs (RegionFactory::compound_associations());
1272
1273                 if (!cassocs.empty()) {
1274                         XMLNode* ca = node->add_child (X_("CompoundAssociations"));
1275
1276                         for (RegionFactory::CompoundAssociations::iterator i = cassocs.begin(); i != cassocs.end(); ++i) {
1277                                 char buf[64];
1278                                 XMLNode* can = new XMLNode (X_("CompoundAssociation"));
1279                                 i->first->id().print (buf, sizeof (buf));
1280                                 can->add_property (X_("copy"), buf);
1281                                 i->second->id().print (buf, sizeof (buf));
1282                                 can->add_property (X_("original"), buf);
1283                                 ca->add_child_nocopy (*can);
1284                         }
1285                 }
1286         }
1287
1288
1289
1290         if (full_state) {
1291
1292                 if (_locations) {
1293                         node->add_child_nocopy (_locations->get_state());
1294                 }
1295         } else {
1296                 Locations loc (*this);
1297                 const bool was_dirty = dirty();
1298                 // for a template, just create a new Locations, populate it
1299                 // with the default start and end, and get the state for that.
1300                 Location* range = new Location (*this, 0, 0, _("session"), Location::IsSessionRange, 0);
1301                 range->set (max_framepos, 0);
1302                 loc.add (range);
1303                 XMLNode& locations_state = loc.get_state();
1304
1305                 if (ARDOUR::Profile->get_trx() && _locations) {
1306                         // For tracks we need stored the Auto Loop Range and all MIDI markers.
1307                         for (Locations::LocationList::const_iterator i = _locations->list ().begin (); i != _locations->list ().end (); ++i) {
1308                                 if ((*i)->is_mark () || (*i)->is_auto_loop ()) {
1309                                         locations_state.add_child_nocopy ((*i)->get_state ());
1310                                 }
1311                         }
1312                 }
1313                 node->add_child_nocopy (locations_state);
1314
1315                 /* adding a location above will have marked the session
1316                  * dirty. This is an artifact, so fix it if the session wasn't
1317                  * already dirty
1318                  */
1319
1320                 if (!was_dirty) {
1321                         _state_of_the_state = StateOfTheState (_state_of_the_state & ~Dirty);
1322                 }
1323         }
1324
1325         child = node->add_child ("Bundles");
1326         {
1327                 boost::shared_ptr<BundleList> bundles = _bundles.reader ();
1328                 for (BundleList::iterator i = bundles->begin(); i != bundles->end(); ++i) {
1329                         boost::shared_ptr<UserBundle> b = boost::dynamic_pointer_cast<UserBundle> (*i);
1330                         if (b) {
1331                                 child->add_child_nocopy (b->get_state());
1332                         }
1333                 }
1334         }
1335
1336         node->add_child_nocopy (_vca_manager->get_state());
1337
1338         child = node->add_child ("Routes");
1339         {
1340                 boost::shared_ptr<RouteList> r = routes.reader ();
1341
1342                 RoutePublicOrderSorter cmp;
1343                 RouteList public_order (*r);
1344                 public_order.sort (cmp);
1345
1346                 /* the sort should have put the monitor out first */
1347
1348                 if (_monitor_out) {
1349                         assert (_monitor_out == public_order.front());
1350                 }
1351
1352                 for (RouteList::iterator i = public_order.begin(); i != public_order.end(); ++i) {
1353                         if (!(*i)->is_auditioner()) {
1354                                 if (full_state) {
1355                                         child->add_child_nocopy ((*i)->get_state());
1356                                 } else {
1357                                         child->add_child_nocopy ((*i)->get_template());
1358                                 }
1359                         }
1360                 }
1361         }
1362
1363         playlists->add_state (node, full_state);
1364
1365         child = node->add_child ("RouteGroups");
1366         for (list<RouteGroup *>::iterator i = _route_groups.begin(); i != _route_groups.end(); ++i) {
1367                 child->add_child_nocopy ((*i)->get_state());
1368         }
1369
1370         if (_click_io) {
1371                 XMLNode* gain_child = node->add_child ("Click");
1372                 gain_child->add_child_nocopy (_click_io->state (full_state));
1373                 gain_child->add_child_nocopy (_click_gain->state (full_state));
1374         }
1375
1376         if (_ltc_input) {
1377                 XMLNode* ltc_input_child = node->add_child ("LTC-In");
1378                 ltc_input_child->add_child_nocopy (_ltc_input->state (full_state));
1379         }
1380
1381         if (_ltc_input) {
1382                 XMLNode* ltc_output_child = node->add_child ("LTC-Out");
1383                 ltc_output_child->add_child_nocopy (_ltc_output->state (full_state));
1384         }
1385
1386         node->add_child_nocopy (_speakers->get_state());
1387         node->add_child_nocopy (_tempo_map->get_state());
1388         node->add_child_nocopy (get_control_protocol_state());
1389
1390         if (_extra_xml) {
1391                 node->add_child_copy (*_extra_xml);
1392         }
1393
1394         {
1395                 Glib::Threads::Mutex::Lock lm (lua_lock);
1396                 std::string saved;
1397                 {
1398                         luabridge::LuaRef savedstate ((*_lua_save)());
1399                         saved = savedstate.cast<std::string>();
1400                 }
1401                 lua.collect_garbage ();
1402                 lm.release ();
1403
1404                 gchar* b64 = g_base64_encode ((const guchar*)saved.c_str (), saved.size ());
1405                 std::string b64s (b64);
1406                 g_free (b64);
1407
1408                 XMLNode* script_node = new XMLNode (X_("Script"));
1409                 script_node->add_property (X_("lua"), LUA_VERSION);
1410                 script_node->add_content (b64s);
1411                 node->add_child_nocopy (*script_node);
1412         }
1413
1414         return *node;
1415 }
1416
1417 XMLNode&
1418 Session::get_control_protocol_state ()
1419 {
1420         ControlProtocolManager& cpm (ControlProtocolManager::instance());
1421         return cpm.get_state();
1422 }
1423
1424 int
1425 Session::set_state (const XMLNode& node, int version)
1426 {
1427         LocaleGuard lg;
1428         XMLNodeList nlist;
1429         XMLNode* child;
1430         XMLProperty const * prop;
1431         int ret = -1;
1432
1433         _state_of_the_state = StateOfTheState (_state_of_the_state|CannotSave);
1434
1435         if (node.name() != X_("Session")) {
1436                 fatal << _("programming error: Session: incorrect XML node sent to set_state()") << endmsg;
1437                 goto out;
1438         }
1439
1440         if ((prop = node.property ("name")) != 0) {
1441                 _name = prop->value ();
1442         }
1443
1444         if ((prop = node.property (X_("sample-rate"))) != 0) {
1445
1446                 _base_frame_rate = atoi (prop->value());
1447                 _nominal_frame_rate = _base_frame_rate;
1448
1449                 assert (AudioEngine::instance()->running ());
1450                 if (_base_frame_rate != AudioEngine::instance()->sample_rate ()) {
1451                         boost::optional<int> r = AskAboutSampleRateMismatch (_base_frame_rate, _current_frame_rate);
1452                         if (r.get_value_or (0)) {
1453                                 goto out;
1454                         }
1455                 }
1456         }
1457
1458         created_with = "unknown";
1459         if ((child = find_named_node (node, "ProgramVersion")) != 0) {
1460                 if ((prop = child->property (X_("created-with"))) != 0) {
1461                         created_with = prop->value ();
1462                 }
1463         }
1464
1465         setup_raid_path(_session_dir->root_path());
1466
1467         if ((prop = node.property (X_("end-is-free"))) != 0) {
1468                 _session_range_end_is_free = string_is_affirmative (prop->value());
1469         }
1470
1471         if ((prop = node.property (X_("id-counter"))) != 0) {
1472                 uint64_t x;
1473                 sscanf (prop->value().c_str(), "%" PRIu64, &x);
1474                 ID::init_counter (x);
1475         } else {
1476                 /* old sessions used a timebased counter, so fake
1477                    the startup ID counter based on a standard
1478                    timestamp.
1479                 */
1480                 time_t now;
1481                 time (&now);
1482                 ID::init_counter (now);
1483         }
1484
1485         if ((prop = node.property (X_("name-counter"))) != 0) {
1486                 init_name_id_counter (atoi (prop->value()));
1487         }
1488
1489         if ((prop = node.property (X_("event-counter"))) != 0) {
1490                 Evoral::init_event_id_counter (atoi (prop->value()));
1491         }
1492
1493         if ((prop = node.property (X_("vca-counter"))) != 0) {
1494                 uint32_t x;
1495                 sscanf (prop->value().c_str(), "%" PRIu32, &x);
1496                 VCA::set_next_vca_number (x);
1497         } else {
1498                 VCA::set_next_vca_number (1);
1499         }
1500
1501         if ((child = find_named_node (node, "MIDIPorts")) != 0) {
1502                 _midi_ports->set_midi_port_states (child->children());
1503         }
1504
1505         IO::disable_connecting ();
1506
1507         Stateful::save_extra_xml (node);
1508
1509         if (((child = find_named_node (node, "Options")) != 0)) { /* old style */
1510                 load_options (*child);
1511         } else if ((child = find_named_node (node, "Config")) != 0) { /* new style */
1512                 load_options (*child);
1513         } else {
1514                 error << _("Session: XML state has no options section") << endmsg;
1515         }
1516
1517         if (version >= 3000) {
1518                 if ((child = find_named_node (node, "Metadata")) == 0) {
1519                         warning << _("Session: XML state has no metadata section") << endmsg;
1520                 } else if ( ARDOUR::SessionMetadata::Metadata()->set_state (*child, version) ) {
1521                         goto out;
1522                 }
1523         }
1524
1525         if ((child = find_named_node (node, X_("Speakers"))) != 0) {
1526                 _speakers->set_state (*child, version);
1527         }
1528
1529         if ((child = find_named_node (node, "Sources")) == 0) {
1530                 error << _("Session: XML state has no sources section") << endmsg;
1531                 goto out;
1532         } else if (load_sources (*child)) {
1533                 goto out;
1534         }
1535
1536         if ((child = find_named_node (node, "TempoMap")) == 0) {
1537                 error << _("Session: XML state has no Tempo Map section") << endmsg;
1538                 goto out;
1539         } else if (_tempo_map->set_state (*child, version)) {
1540                 goto out;
1541         }
1542
1543         if ((child = find_named_node (node, "Locations")) == 0) {
1544                 error << _("Session: XML state has no locations section") << endmsg;
1545                 goto out;
1546         } else if (_locations->set_state (*child, version)) {
1547                 goto out;
1548         }
1549
1550         locations_changed ();
1551
1552         if (_session_range_location) {
1553                 AudioFileSource::set_header_position_offset (_session_range_location->start());
1554         }
1555
1556         if ((child = find_named_node (node, "Regions")) == 0) {
1557                 error << _("Session: XML state has no Regions section") << endmsg;
1558                 goto out;
1559         } else if (load_regions (*child)) {
1560                 goto out;
1561         }
1562
1563         if ((child = find_named_node (node, "Playlists")) == 0) {
1564                 error << _("Session: XML state has no playlists section") << endmsg;
1565                 goto out;
1566         } else if (playlists->load (*this, *child)) {
1567                 goto out;
1568         }
1569
1570         if ((child = find_named_node (node, "UnusedPlaylists")) == 0) {
1571                 // this is OK
1572         } else if (playlists->load_unused (*this, *child)) {
1573                 goto out;
1574         }
1575
1576         if ((child = find_named_node (node, "CompoundAssociations")) != 0) {
1577                 if (load_compounds (*child)) {
1578                         goto out;
1579                 }
1580         }
1581
1582         if (version >= 3000) {
1583                 if ((child = find_named_node (node, "Bundles")) == 0) {
1584                         warning << _("Session: XML state has no bundles section") << endmsg;
1585                         //goto out;
1586                 } else {
1587                         /* We can't load Bundles yet as they need to be able
1588                            to convert from port names to Port objects, which can't happen until
1589                            later */
1590                         _bundle_xml_node = new XMLNode (*child);
1591                 }
1592         }
1593
1594         if (version < 3000) {
1595                 if ((child = find_named_node (node, X_("DiskStreams"))) == 0) {
1596                         error << _("Session: XML state has no diskstreams section") << endmsg;
1597                         goto out;
1598                 } else if (load_diskstreams_2X (*child, version)) {
1599                         goto out;
1600                 }
1601         }
1602
1603         if ((child = find_named_node (node, VCAManager::xml_node_name)) != 0) {
1604                 _vca_manager->set_state (*child, version);
1605         }
1606
1607         if ((child = find_named_node (node, "Routes")) == 0) {
1608                 error << _("Session: XML state has no routes section") << endmsg;
1609                 goto out;
1610         } else if (load_routes (*child, version)) {
1611                 goto out;
1612         }
1613
1614         /* Now that we have Routes and masters loaded, connect them if appropriate */
1615
1616         Slavable::Assign (_vca_manager); /* EMIT SIGNAL */
1617
1618         /* our diskstreams list is no longer needed as they are now all owned by their Route */
1619         _diskstreams_2X.clear ();
1620
1621         if (version >= 3000) {
1622
1623                 if ((child = find_named_node (node, "RouteGroups")) == 0) {
1624                         error << _("Session: XML state has no route groups section") << endmsg;
1625                         goto out;
1626                 } else if (load_route_groups (*child, version)) {
1627                         goto out;
1628                 }
1629
1630         } else if (version < 3000) {
1631
1632                 if ((child = find_named_node (node, "EditGroups")) == 0) {
1633                         error << _("Session: XML state has no edit groups section") << endmsg;
1634                         goto out;
1635                 } else if (load_route_groups (*child, version)) {
1636                         goto out;
1637                 }
1638
1639                 if ((child = find_named_node (node, "MixGroups")) == 0) {
1640                         error << _("Session: XML state has no mix groups section") << endmsg;
1641                         goto out;
1642                 } else if (load_route_groups (*child, version)) {
1643                         goto out;
1644                 }
1645         }
1646
1647         if ((child = find_named_node (node, "Click")) == 0) {
1648                 warning << _("Session: XML state has no click section") << endmsg;
1649         } else if (_click_io) {
1650                 setup_click_state (&node);
1651         }
1652
1653         if ((child = find_named_node (node, ControlProtocolManager::state_node_name)) != 0) {
1654                 ControlProtocolManager::instance().set_state (*child, version);
1655         }
1656
1657         if ((child = find_named_node (node, "Script"))) {
1658                 for (XMLNodeList::const_iterator n = child->children ().begin (); n != child->children ().end (); ++n) {
1659                         if (!(*n)->is_content ()) { continue; }
1660                         gsize size;
1661                         guchar* buf = g_base64_decode ((*n)->content ().c_str (), &size);
1662                         try {
1663                                 Glib::Threads::Mutex::Lock lm (lua_lock);
1664                                 (*_lua_load)(std::string ((const char*)buf, size));
1665                         } catch (luabridge::LuaException const& e) {
1666                                 cerr << "LuaException:" << e.what () << endl;
1667                         }
1668                         g_free (buf);
1669                 }
1670         }
1671
1672         update_route_record_state ();
1673
1674         /* here beginneth the second phase ... */
1675         set_snapshot_name (_current_snapshot_name);
1676
1677         StateReady (); /* EMIT SIGNAL */
1678
1679         delete state_tree;
1680         state_tree = 0;
1681         return 0;
1682
1683   out:
1684         delete state_tree;
1685         state_tree = 0;
1686         return ret;
1687 }
1688
1689 int
1690 Session::load_routes (const XMLNode& node, int version)
1691 {
1692         XMLNodeList nlist;
1693         XMLNodeConstIterator niter;
1694         RouteList new_routes;
1695
1696         nlist = node.children();
1697
1698         set_dirty();
1699
1700         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1701
1702                 boost::shared_ptr<Route> route;
1703                 if (version < 3000) {
1704                         route = XMLRouteFactory_2X (**niter, version);
1705                 } else {
1706                         route = XMLRouteFactory (**niter, version);
1707                 }
1708
1709                 if (route == 0) {
1710                         error << _("Session: cannot create Route from XML description.") << endmsg;
1711                         return -1;
1712                 }
1713
1714                 BootMessage (string_compose (_("Loaded track/bus %1"), route->name()));
1715
1716                 new_routes.push_back (route);
1717         }
1718
1719         BootMessage (_("Tracks/busses loaded;  Adding to Session"));
1720
1721         add_routes (new_routes, false, false, false, PresentationInfo::max_order);
1722
1723         BootMessage (_("Finished adding tracks/busses"));
1724
1725         return 0;
1726 }
1727
1728 boost::shared_ptr<Route>
1729 Session::XMLRouteFactory (const XMLNode& node, int version)
1730 {
1731         boost::shared_ptr<Route> ret;
1732
1733         if (node.name() != "Route") {
1734                 return ret;
1735         }
1736
1737         XMLNode* ds_child = find_named_node (node, X_("Diskstream"));
1738
1739         DataType type = DataType::AUDIO;
1740         XMLProperty const * prop = node.property("default-type");
1741
1742         if (prop) {
1743                 type = DataType (prop->value());
1744         }
1745
1746         assert (type != DataType::NIL);
1747
1748         if (ds_child) {
1749
1750                 boost::shared_ptr<Track> track;
1751
1752                 if (type == DataType::AUDIO) {
1753                         track.reset (new AudioTrack (*this, X_("toBeResetFroXML")));
1754                 } else {
1755                         track.reset (new MidiTrack (*this, X_("toBeResetFroXML")));
1756                 }
1757
1758                 if (track->init()) {
1759                         return ret;
1760                 }
1761
1762                 if (track->set_state (node, version)) {
1763                         return ret;
1764                 }
1765
1766                 BOOST_MARK_TRACK (track);
1767                 ret = track;
1768
1769         } else {
1770                 PresentationInfo::Flag flags = PresentationInfo::get_flags (node);
1771                 boost::shared_ptr<Route> r (new Route (*this, X_("toBeResetFroXML"), flags));
1772
1773                 if (r->init () == 0 && r->set_state (node, version) == 0) {
1774                         BOOST_MARK_ROUTE (r);
1775                         ret = r;
1776                 }
1777         }
1778
1779         return ret;
1780 }
1781
1782 boost::shared_ptr<Route>
1783 Session::XMLRouteFactory_2X (const XMLNode& node, int version)
1784 {
1785         boost::shared_ptr<Route> ret;
1786
1787         if (node.name() != "Route") {
1788                 return ret;
1789         }
1790
1791         XMLProperty const * ds_prop = node.property (X_("diskstream-id"));
1792         if (!ds_prop) {
1793                 ds_prop = node.property (X_("diskstream"));
1794         }
1795
1796         DataType type = DataType::AUDIO;
1797         XMLProperty const * prop = node.property("default-type");
1798
1799         if (prop) {
1800                 type = DataType (prop->value());
1801         }
1802
1803         assert (type != DataType::NIL);
1804
1805         if (ds_prop) {
1806
1807                 list<boost::shared_ptr<Diskstream> >::iterator i = _diskstreams_2X.begin ();
1808                 while (i != _diskstreams_2X.end() && (*i)->id() != ds_prop->value()) {
1809                         ++i;
1810                 }
1811
1812                 if (i == _diskstreams_2X.end()) {
1813                         error << _("Could not find diskstream for route") << endmsg;
1814                         return boost::shared_ptr<Route> ();
1815                 }
1816
1817                 boost::shared_ptr<Track> track;
1818
1819                 if (type == DataType::AUDIO) {
1820                         track.reset (new AudioTrack (*this, X_("toBeResetFroXML")));
1821                 } else {
1822                         track.reset (new MidiTrack (*this, X_("toBeResetFroXML")));
1823                 }
1824
1825                 if (track->init()) {
1826                         return ret;
1827                 }
1828
1829                 if (track->set_state (node, version)) {
1830                         return ret;
1831                 }
1832
1833                 track->set_diskstream (*i);
1834
1835                 BOOST_MARK_TRACK (track);
1836                 ret = track;
1837
1838         } else {
1839                 PresentationInfo::Flag flags = PresentationInfo::get_flags (node);
1840                 boost::shared_ptr<Route> r (new Route (*this, X_("toBeResetFroXML"), flags));
1841
1842                 if (r->init () == 0 && r->set_state (node, version) == 0) {
1843                         BOOST_MARK_ROUTE (r);
1844                         ret = r;
1845                 }
1846         }
1847
1848         return ret;
1849 }
1850
1851 int
1852 Session::load_regions (const XMLNode& node)
1853 {
1854         XMLNodeList nlist;
1855         XMLNodeConstIterator niter;
1856         boost::shared_ptr<Region> region;
1857
1858         nlist = node.children();
1859
1860         set_dirty();
1861
1862         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1863                 if ((region = XMLRegionFactory (**niter, false)) == 0) {
1864                         error << _("Session: cannot create Region from XML description.");
1865                         XMLProperty const * name = (**niter).property("name");
1866
1867                         if (name) {
1868                                 error << " " << string_compose (_("Can not load state for region '%1'"), name->value());
1869                         }
1870
1871                         error << endmsg;
1872                 }
1873         }
1874
1875         return 0;
1876 }
1877
1878 int
1879 Session::load_compounds (const XMLNode& node)
1880 {
1881         XMLNodeList calist = node.children();
1882         XMLNodeConstIterator caiter;
1883         XMLProperty const * caprop;
1884
1885         for (caiter = calist.begin(); caiter != calist.end(); ++caiter) {
1886                 XMLNode* ca = *caiter;
1887                 ID orig_id;
1888                 ID copy_id;
1889
1890                 if ((caprop = ca->property (X_("original"))) == 0) {
1891                         continue;
1892                 }
1893                 orig_id = caprop->value();
1894
1895                 if ((caprop = ca->property (X_("copy"))) == 0) {
1896                         continue;
1897                 }
1898                 copy_id = caprop->value();
1899
1900                 boost::shared_ptr<Region> orig = RegionFactory::region_by_id (orig_id);
1901                 boost::shared_ptr<Region> copy = RegionFactory::region_by_id (copy_id);
1902
1903                 if (!orig || !copy) {
1904                         warning << string_compose (_("Regions in compound description not found (ID's %1 and %2): ignored"),
1905                                                    orig_id, copy_id)
1906                                 << endmsg;
1907                         continue;
1908                 }
1909
1910                 RegionFactory::add_compound_association (orig, copy);
1911         }
1912
1913         return 0;
1914 }
1915
1916 void
1917 Session::load_nested_sources (const XMLNode& node)
1918 {
1919         XMLNodeList nlist;
1920         XMLNodeConstIterator niter;
1921
1922         nlist = node.children();
1923
1924         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1925                 if ((*niter)->name() == "Source") {
1926
1927                         /* it may already exist, so don't recreate it unnecessarily
1928                          */
1929
1930                         XMLProperty const * prop = (*niter)->property (X_("id"));
1931                         if (!prop) {
1932                                 error << _("Nested source has no ID info in session file! (ignored)") << endmsg;
1933                                 continue;
1934                         }
1935
1936                         ID source_id (prop->value());
1937
1938                         if (!source_by_id (source_id)) {
1939
1940                                 try {
1941                                         SourceFactory::create (*this, **niter, true);
1942                                 }
1943                                 catch (failed_constructor& err) {
1944                                         error << string_compose (_("Cannot reconstruct nested source for region %1"), name()) << endmsg;
1945                                 }
1946                         }
1947                 }
1948         }
1949 }
1950
1951 boost::shared_ptr<Region>
1952 Session::XMLRegionFactory (const XMLNode& node, bool full)
1953 {
1954         XMLProperty const * type = node.property("type");
1955
1956         try {
1957
1958                 const XMLNodeList& nlist = node.children();
1959
1960                 for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
1961                         XMLNode *child = (*niter);
1962                         if (child->name() == "NestedSource") {
1963                                 load_nested_sources (*child);
1964                         }
1965                 }
1966
1967                 if (!type || type->value() == "audio") {
1968                         return boost::shared_ptr<Region>(XMLAudioRegionFactory (node, full));
1969                 } else if (type->value() == "midi") {
1970                         return boost::shared_ptr<Region>(XMLMidiRegionFactory (node, full));
1971                 }
1972
1973         } catch (failed_constructor& err) {
1974                 return boost::shared_ptr<Region> ();
1975         }
1976
1977         return boost::shared_ptr<Region> ();
1978 }
1979
1980 boost::shared_ptr<AudioRegion>
1981 Session::XMLAudioRegionFactory (const XMLNode& node, bool /*full*/)
1982 {
1983         XMLProperty const * prop;
1984         boost::shared_ptr<Source> source;
1985         boost::shared_ptr<AudioSource> as;
1986         SourceList sources;
1987         SourceList master_sources;
1988         uint32_t nchans = 1;
1989         char buf[128];
1990
1991         if (node.name() != X_("Region")) {
1992                 return boost::shared_ptr<AudioRegion>();
1993         }
1994
1995         if ((prop = node.property (X_("channels"))) != 0) {
1996                 nchans = atoi (prop->value().c_str());
1997         }
1998
1999         if ((prop = node.property ("name")) == 0) {
2000                 cerr << "no name for this region\n";
2001                 abort ();
2002         }
2003
2004         if ((prop = node.property (X_("source-0"))) == 0) {
2005                 if ((prop = node.property ("source")) == 0) {
2006                         error << _("Session: XMLNode describing a AudioRegion is incomplete (no source)") << endmsg;
2007                         return boost::shared_ptr<AudioRegion>();
2008                 }
2009         }
2010
2011         PBD::ID s_id (prop->value());
2012
2013         if ((source = source_by_id (s_id)) == 0) {
2014                 error << string_compose(_("Session: XMLNode describing a AudioRegion references an unknown source id =%1"), s_id) << endmsg;
2015                 return boost::shared_ptr<AudioRegion>();
2016         }
2017
2018         as = boost::dynamic_pointer_cast<AudioSource>(source);
2019         if (!as) {
2020                 error << string_compose(_("Session: XMLNode describing a AudioRegion references a non-audio source id =%1"), s_id) << endmsg;
2021                 return boost::shared_ptr<AudioRegion>();
2022         }
2023
2024         sources.push_back (as);
2025
2026         /* pickup other channels */
2027
2028         for (uint32_t n=1; n < nchans; ++n) {
2029                 snprintf (buf, sizeof(buf), X_("source-%d"), n);
2030                 if ((prop = node.property (buf)) != 0) {
2031
2032                         PBD::ID id2 (prop->value());
2033
2034                         if ((source = source_by_id (id2)) == 0) {
2035                                 error << string_compose(_("Session: XMLNode describing a AudioRegion references an unknown source id =%1"), id2) << endmsg;
2036                                 return boost::shared_ptr<AudioRegion>();
2037                         }
2038
2039                         as = boost::dynamic_pointer_cast<AudioSource>(source);
2040                         if (!as) {
2041                                 error << string_compose(_("Session: XMLNode describing a AudioRegion references a non-audio source id =%1"), id2) << endmsg;
2042                                 return boost::shared_ptr<AudioRegion>();
2043                         }
2044                         sources.push_back (as);
2045                 }
2046         }
2047
2048         for (uint32_t n = 0; n < nchans; ++n) {
2049                 snprintf (buf, sizeof(buf), X_("master-source-%d"), n);
2050                 if ((prop = node.property (buf)) != 0) {
2051
2052                         PBD::ID id2 (prop->value());
2053
2054                         if ((source = source_by_id (id2)) == 0) {
2055                                 error << string_compose(_("Session: XMLNode describing a AudioRegion references an unknown source id =%1"), id2) << endmsg;
2056                                 return boost::shared_ptr<AudioRegion>();
2057                         }
2058
2059                         as = boost::dynamic_pointer_cast<AudioSource>(source);
2060                         if (!as) {
2061                                 error << string_compose(_("Session: XMLNode describing a AudioRegion references a non-audio source id =%1"), id2) << endmsg;
2062                                 return boost::shared_ptr<AudioRegion>();
2063                         }
2064                         master_sources.push_back (as);
2065                 }
2066         }
2067
2068         try {
2069                 boost::shared_ptr<AudioRegion> region (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (sources, node)));
2070
2071                 /* a final detail: this is the one and only place that we know how long missing files are */
2072
2073                 if (region->whole_file()) {
2074                         for (SourceList::iterator sx = sources.begin(); sx != sources.end(); ++sx) {
2075                                 boost::shared_ptr<SilentFileSource> sfp = boost::dynamic_pointer_cast<SilentFileSource> (*sx);
2076                                 if (sfp) {
2077                                         sfp->set_length (region->length());
2078                                 }
2079                         }
2080                 }
2081
2082                 if (!master_sources.empty()) {
2083                         if (master_sources.size() != nchans) {
2084                                 error << _("Session: XMLNode describing an AudioRegion is missing some master sources; ignored") << endmsg;
2085                         } else {
2086                                 region->set_master_sources (master_sources);
2087                         }
2088                 }
2089
2090                 return region;
2091
2092         }
2093
2094         catch (failed_constructor& err) {
2095                 return boost::shared_ptr<AudioRegion>();
2096         }
2097 }
2098
2099 boost::shared_ptr<MidiRegion>
2100 Session::XMLMidiRegionFactory (const XMLNode& node, bool /*full*/)
2101 {
2102         XMLProperty const * prop;
2103         boost::shared_ptr<Source> source;
2104         boost::shared_ptr<MidiSource> ms;
2105         SourceList sources;
2106
2107         if (node.name() != X_("Region")) {
2108                 return boost::shared_ptr<MidiRegion>();
2109         }
2110
2111         if ((prop = node.property ("name")) == 0) {
2112                 cerr << "no name for this region\n";
2113                 abort ();
2114         }
2115
2116         if ((prop = node.property (X_("source-0"))) == 0) {
2117                 if ((prop = node.property ("source")) == 0) {
2118                         error << _("Session: XMLNode describing a MidiRegion is incomplete (no source)") << endmsg;
2119                         return boost::shared_ptr<MidiRegion>();
2120                 }
2121         }
2122
2123         PBD::ID s_id (prop->value());
2124
2125         if ((source = source_by_id (s_id)) == 0) {
2126                 error << string_compose(_("Session: XMLNode describing a MidiRegion references an unknown source id =%1"), s_id) << endmsg;
2127                 return boost::shared_ptr<MidiRegion>();
2128         }
2129
2130         ms = boost::dynamic_pointer_cast<MidiSource>(source);
2131         if (!ms) {
2132                 error << string_compose(_("Session: XMLNode describing a MidiRegion references a non-midi source id =%1"), s_id) << endmsg;
2133                 return boost::shared_ptr<MidiRegion>();
2134         }
2135
2136         sources.push_back (ms);
2137
2138         try {
2139                 boost::shared_ptr<MidiRegion> region (boost::dynamic_pointer_cast<MidiRegion> (RegionFactory::create (sources, node)));
2140                 /* a final detail: this is the one and only place that we know how long missing files are */
2141
2142                 if (region->whole_file()) {
2143                         for (SourceList::iterator sx = sources.begin(); sx != sources.end(); ++sx) {
2144                                 boost::shared_ptr<SilentFileSource> sfp = boost::dynamic_pointer_cast<SilentFileSource> (*sx);
2145                                 if (sfp) {
2146                                         sfp->set_length (region->length());
2147                                 }
2148                         }
2149                 }
2150
2151                 return region;
2152         }
2153
2154         catch (failed_constructor& err) {
2155                 return boost::shared_ptr<MidiRegion>();
2156         }
2157 }
2158
2159 XMLNode&
2160 Session::get_sources_as_xml ()
2161
2162 {
2163         XMLNode* node = new XMLNode (X_("Sources"));
2164         Glib::Threads::Mutex::Lock lm (source_lock);
2165
2166         for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
2167                 node->add_child_nocopy (i->second->get_state());
2168         }
2169
2170         return *node;
2171 }
2172
2173 void
2174 Session::reset_write_sources (bool mark_write_complete, bool force)
2175 {
2176         boost::shared_ptr<RouteList> rl = routes.reader();
2177         for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
2178                 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
2179                 if (tr) {
2180                         _state_of_the_state = StateOfTheState (_state_of_the_state|InCleanup);
2181                         tr->reset_write_sources(mark_write_complete, force);
2182                         _state_of_the_state = StateOfTheState (_state_of_the_state & ~InCleanup);
2183                 }
2184         }
2185 }
2186
2187 int
2188 Session::load_sources (const XMLNode& node)
2189 {
2190         XMLNodeList nlist;
2191         XMLNodeConstIterator niter;
2192         /* don't need this but it stops some
2193          * versions of gcc complaining about
2194          * discarded return values.
2195          */
2196         boost::shared_ptr<Source> source;
2197
2198         nlist = node.children();
2199
2200         set_dirty();
2201         std::map<std::string, std::string> relocation;
2202
2203         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2204 #ifdef PLATFORM_WINDOWS
2205                 int old_mode = 0;
2206 #endif
2207
2208                 XMLNode srcnode (**niter);
2209                 bool try_replace_abspath = true;
2210
2211 retry:
2212                 try {
2213 #ifdef PLATFORM_WINDOWS
2214                         // do not show "insert media" popups (files embedded from removable media).
2215                         old_mode = SetErrorMode(SEM_FAILCRITICALERRORS);
2216 #endif
2217                         if ((source = XMLSourceFactory (srcnode)) == 0) {
2218                                 error << _("Session: cannot create Source from XML description.") << endmsg;
2219                         }
2220 #ifdef PLATFORM_WINDOWS
2221                         SetErrorMode(old_mode);
2222 #endif
2223
2224                 } catch (MissingSource& err) {
2225 #ifdef PLATFORM_WINDOWS
2226                         SetErrorMode(old_mode);
2227 #endif
2228
2229                         /* try previous abs path replacements first */
2230                         if (try_replace_abspath && Glib::path_is_absolute (err.path)) {
2231                                 std::string dir = Glib::path_get_dirname (err.path);
2232                                 std::map<std::string, std::string>::const_iterator rl = relocation.find (dir);
2233                                 if (rl != relocation.end ()) {
2234                                         std::string newpath = Glib::build_filename (rl->second, Glib::path_get_basename (err.path));
2235                                         if (Glib::file_test (newpath, Glib::FILE_TEST_EXISTS)) {
2236                                                 srcnode.add_property ("origin", newpath);
2237                                                 try_replace_abspath = false;
2238                                                 goto retry;
2239                                         }
2240                                 }
2241                         }
2242
2243                         int user_choice;
2244                         _missing_file_replacement = "";
2245
2246                         if (err.type == DataType::MIDI && Glib::path_is_absolute (err.path)) {
2247                                 error << string_compose (_("An external MIDI file is missing. %1 cannot currently recover from missing external MIDI files"),
2248                                                 PROGRAM_NAME) << endmsg;
2249                                 return -1;
2250                         }
2251
2252                         if (!no_questions_about_missing_files) {
2253                                 user_choice = MissingFile (this, err.path, err.type).get_value_or (-1);
2254                         } else {
2255                                 user_choice = -2;
2256                         }
2257
2258                         switch (user_choice) {
2259                                 case 0:
2260                                         /* user added a new search location
2261                                          * or selected a new absolute path,
2262                                          * so try again */
2263                                         if (Glib::path_is_absolute (err.path)) {
2264                                                 if (!_missing_file_replacement.empty ()) {
2265                                                         /* replace origin, in XML */
2266                                                         std::string newpath = Glib::build_filename (
2267                                                                         _missing_file_replacement, Glib::path_get_basename (err.path));
2268                                                         srcnode.add_property ("origin", newpath);
2269                                                         relocation[Glib::path_get_dirname (err.path)] = _missing_file_replacement;
2270                                                         _missing_file_replacement = "";
2271                                                 }
2272                                         }
2273                                         goto retry;
2274
2275
2276                                 case 1:
2277                                         /* user asked to quit the entire session load */
2278                                         return -1;
2279
2280                                 case 2:
2281                                         no_questions_about_missing_files = true;
2282                                         goto retry;
2283
2284                                 case 3:
2285                                         no_questions_about_missing_files = true;
2286                                         /* fallthru */
2287
2288                                 case -1:
2289                                 default:
2290                                         switch (err.type) {
2291
2292                                                 case DataType::AUDIO:
2293                                                         source = SourceFactory::createSilent (*this, **niter, max_framecnt, _current_frame_rate);
2294                                                         break;
2295
2296                                                 case DataType::MIDI:
2297                                                         /* The MIDI file is actually missing so
2298                                                          * just create a new one in the same
2299                                                          * location. Do not announce its
2300                                                          */
2301                                                         string fullpath;
2302
2303                                                         if (!Glib::path_is_absolute (err.path)) {
2304                                                                 fullpath = Glib::build_filename (source_search_path (DataType::MIDI).front(), err.path);
2305                                                         } else {
2306                                                                 /* this should be an unrecoverable error: we would be creating a MIDI file outside
2307                                                                  * the session tree.
2308                                                                  */
2309                                                                 return -1;
2310                                                         }
2311                                                         /* Note that we do not announce the source just yet - we need to reset its ID before we do that */
2312                                                         source = SourceFactory::createWritable (DataType::MIDI, *this, fullpath, false, _current_frame_rate, false, false);
2313                                                         /* reset ID to match the missing one */
2314                                                         source->set_id (**niter);
2315                                                         /* Now we can announce it */
2316                                                         SourceFactory::SourceCreated (source);
2317                                                         break;
2318                                         }
2319                                         break;
2320                         }
2321                 }
2322         }
2323
2324         return 0;
2325 }
2326
2327 boost::shared_ptr<Source>
2328 Session::XMLSourceFactory (const XMLNode& node)
2329 {
2330         if (node.name() != "Source") {
2331                 return boost::shared_ptr<Source>();
2332         }
2333
2334         try {
2335                 /* note: do peak building in another thread when loading session state */
2336                 return SourceFactory::create (*this, node, true);
2337         }
2338
2339         catch (failed_constructor& err) {
2340                 error << string_compose (_("Found a sound file that cannot be used by %1. Talk to the programmers."), PROGRAM_NAME) << endmsg;
2341                 return boost::shared_ptr<Source>();
2342         }
2343 }
2344
2345 int
2346 Session::save_template (string template_name, bool replace_existing)
2347 {
2348         if ((_state_of_the_state & CannotSave) || template_name.empty ()) {
2349                 return -1;
2350         }
2351
2352         bool absolute_path = Glib::path_is_absolute (template_name);
2353
2354         /* directory to put the template in */
2355         std::string template_dir_path;
2356
2357         if (!absolute_path) {
2358                 std::string user_template_dir(user_template_directory());
2359
2360                 if (g_mkdir_with_parents (user_template_dir.c_str(), 0755) != 0) {
2361                         error << string_compose(_("Could not create templates directory \"%1\" (%2)"),
2362                                         user_template_dir, g_strerror (errno)) << endmsg;
2363                         return -1;
2364                 }
2365
2366                 template_dir_path = Glib::build_filename (user_template_dir, template_name);
2367         } else {
2368                 template_dir_path = template_name;
2369         }
2370
2371         if (!ARDOUR::Profile->get_trx()) {
2372                 if (!replace_existing && Glib::file_test (template_dir_path, Glib::FILE_TEST_EXISTS)) {
2373                         warning << string_compose(_("Template \"%1\" already exists - new version not created"),
2374                                                                           template_dir_path) << endmsg;
2375                         return -2;
2376                 }
2377
2378                 if (g_mkdir_with_parents (template_dir_path.c_str(), 0755) != 0) {
2379                         error << string_compose(_("Could not create directory for Session template\"%1\" (%2)"),
2380                                                                         template_dir_path, g_strerror (errno)) << endmsg;
2381                         return -1;
2382                 }
2383         }
2384
2385         /* file to write */
2386         std::string template_file_path;
2387
2388         if (ARDOUR::Profile->get_trx()) {
2389                 template_file_path = template_name;
2390         } else {
2391                 if (absolute_path) {
2392                         template_file_path = Glib::build_filename (template_dir_path, Glib::path_get_basename (template_dir_path) + template_suffix);
2393                 } else {
2394                         template_file_path = Glib::build_filename (template_dir_path, template_name + template_suffix);
2395                 }
2396         }
2397
2398         SessionSaveUnderway (); /* EMIT SIGNAL */
2399
2400         XMLTree tree;
2401
2402         {
2403                 PBD::Unwinder<std::string> uw (_template_state_dir, template_dir_path);
2404                 tree.set_root (&get_template());
2405         }
2406
2407         if (!tree.write (template_file_path)) {
2408                 error << _("template not saved") << endmsg;
2409                 return -1;
2410         }
2411
2412         store_recent_templates (template_file_path);
2413
2414         return 0;
2415 }
2416
2417 void
2418 Session::refresh_disk_space ()
2419 {
2420 #if __APPLE__ || __FreeBSD__ || __NetBSD__ || (HAVE_SYS_VFS_H && HAVE_SYS_STATVFS_H)
2421
2422         Glib::Threads::Mutex::Lock lm (space_lock);
2423
2424         /* get freespace on every FS that is part of the session path */
2425
2426         _total_free_4k_blocks = 0;
2427         _total_free_4k_blocks_uncertain = false;
2428
2429         for (vector<space_and_path>::iterator i = session_dirs.begin(); i != session_dirs.end(); ++i) {
2430 #if defined(__NetBSD__)
2431                 struct statvfs statfsbuf;
2432
2433                 statvfs (i->path.c_str(), &statfsbuf);
2434 #else
2435                 struct statfs statfsbuf;
2436
2437                 statfs (i->path.c_str(), &statfsbuf);
2438 #endif
2439                 double const scale = statfsbuf.f_bsize / 4096.0;
2440
2441                 /* See if this filesystem is read-only */
2442                 struct statvfs statvfsbuf;
2443                 statvfs (i->path.c_str(), &statvfsbuf);
2444
2445                 /* f_bavail can be 0 if it is undefined for whatever
2446                    filesystem we are looking at; Samba shares mounted
2447                    via GVFS are an example of this.
2448                 */
2449                 if (statfsbuf.f_bavail == 0) {
2450                         /* block count unknown */
2451                         i->blocks = 0;
2452                         i->blocks_unknown = true;
2453                 } else if (statvfsbuf.f_flag & ST_RDONLY) {
2454                         /* read-only filesystem */
2455                         i->blocks = 0;
2456                         i->blocks_unknown = false;
2457                 } else {
2458                         /* read/write filesystem with known space */
2459                         i->blocks = (uint32_t) floor (statfsbuf.f_bavail * scale);
2460                         i->blocks_unknown = false;
2461                 }
2462
2463                 _total_free_4k_blocks += i->blocks;
2464                 if (i->blocks_unknown) {
2465                         _total_free_4k_blocks_uncertain = true;
2466                 }
2467         }
2468 #elif defined PLATFORM_WINDOWS
2469         vector<string> scanned_volumes;
2470         vector<string>::iterator j;
2471         vector<space_and_path>::iterator i;
2472     DWORD nSectorsPerCluster, nBytesPerSector,
2473           nFreeClusters, nTotalClusters;
2474     char disk_drive[4];
2475         bool volume_found;
2476
2477         _total_free_4k_blocks = 0;
2478
2479         for (i = session_dirs.begin(); i != session_dirs.end(); i++) {
2480                 strncpy (disk_drive, (*i).path.c_str(), 3);
2481                 disk_drive[3] = 0;
2482                 strupr(disk_drive);
2483
2484                 volume_found = false;
2485                 if (0 != (GetDiskFreeSpace(disk_drive, &nSectorsPerCluster, &nBytesPerSector, &nFreeClusters, &nTotalClusters)))
2486                 {
2487                         int64_t nBytesPerCluster = nBytesPerSector * nSectorsPerCluster;
2488                         int64_t nFreeBytes = nBytesPerCluster * (int64_t)nFreeClusters;
2489                         i->blocks = (uint32_t)(nFreeBytes / 4096);
2490
2491                         for (j = scanned_volumes.begin(); j != scanned_volumes.end(); j++) {
2492                                 if (0 == j->compare(disk_drive)) {
2493                                         volume_found = true;
2494                                         break;
2495                                 }
2496                         }
2497
2498                         if (!volume_found) {
2499                                 scanned_volumes.push_back(disk_drive);
2500                                 _total_free_4k_blocks += i->blocks;
2501                         }
2502                 }
2503         }
2504
2505         if (0 == _total_free_4k_blocks) {
2506                 strncpy (disk_drive, path().c_str(), 3);
2507                 disk_drive[3] = 0;
2508
2509                 if (0 != (GetDiskFreeSpace(disk_drive, &nSectorsPerCluster, &nBytesPerSector, &nFreeClusters, &nTotalClusters)))
2510                 {
2511                         int64_t nBytesPerCluster = nBytesPerSector * nSectorsPerCluster;
2512                         int64_t nFreeBytes = nBytesPerCluster * (int64_t)nFreeClusters;
2513                         _total_free_4k_blocks = (uint32_t)(nFreeBytes / 4096);
2514                 }
2515         }
2516 #endif
2517 }
2518
2519 string
2520 Session::get_best_session_directory_for_new_audio ()
2521 {
2522         vector<space_and_path>::iterator i;
2523         string result = _session_dir->root_path();
2524
2525         /* handle common case without system calls */
2526
2527         if (session_dirs.size() == 1) {
2528                 return result;
2529         }
2530
2531         /* OK, here's the algorithm we're following here:
2532
2533         We want to select which directory to use for
2534         the next file source to be created. Ideally,
2535         we'd like to use a round-robin process so as to
2536         get maximum performance benefits from splitting
2537         the files across multiple disks.
2538
2539         However, in situations without much diskspace, an
2540         RR approach may end up filling up a filesystem
2541         with new files while others still have space.
2542         Its therefore important to pay some attention to
2543         the freespace in the filesystem holding each
2544         directory as well. However, if we did that by
2545         itself, we'd keep creating new files in the file
2546         system with the most space until it was as full
2547         as all others, thus negating any performance
2548         benefits of this RAID-1 like approach.
2549
2550         So, we use a user-configurable space threshold. If
2551         there are at least 2 filesystems with more than this
2552         much space available, we use RR selection between them.
2553         If not, then we pick the filesystem with the most space.
2554
2555         This gets a good balance between the two
2556         approaches.
2557         */
2558
2559         refresh_disk_space ();
2560
2561         int free_enough = 0;
2562
2563         for (i = session_dirs.begin(); i != session_dirs.end(); ++i) {
2564                 if ((*i).blocks * 4096 >= Config->get_disk_choice_space_threshold()) {
2565                         free_enough++;
2566                 }
2567         }
2568
2569         if (free_enough >= 2) {
2570                 /* use RR selection process, ensuring that the one
2571                    picked works OK.
2572                 */
2573
2574                 i = last_rr_session_dir;
2575
2576                 do {
2577                         if (++i == session_dirs.end()) {
2578                                 i = session_dirs.begin();
2579                         }
2580
2581                         if ((*i).blocks * 4096 >= Config->get_disk_choice_space_threshold()) {
2582                                 SessionDirectory sdir(i->path);
2583                                 if (sdir.create ()) {
2584                                         result = (*i).path;
2585                                         last_rr_session_dir = i;
2586                                         return result;
2587                                 }
2588                         }
2589
2590                 } while (i != last_rr_session_dir);
2591
2592         } else {
2593
2594                 /* pick FS with the most freespace (and that
2595                    seems to actually work ...)
2596                 */
2597
2598                 vector<space_and_path> sorted;
2599                 space_and_path_ascending_cmp cmp;
2600
2601                 sorted = session_dirs;
2602                 sort (sorted.begin(), sorted.end(), cmp);
2603
2604                 for (i = sorted.begin(); i != sorted.end(); ++i) {
2605                         SessionDirectory sdir(i->path);
2606                         if (sdir.create ()) {
2607                                 result = (*i).path;
2608                                 last_rr_session_dir = i;
2609                                 return result;
2610                         }
2611                 }
2612         }
2613
2614         return result;
2615 }
2616
2617 string
2618 Session::automation_dir () const
2619 {
2620         return Glib::build_filename (_path, automation_dir_name);
2621 }
2622
2623 string
2624 Session::analysis_dir () const
2625 {
2626         return Glib::build_filename (_path, analysis_dir_name);
2627 }
2628
2629 string
2630 Session::plugins_dir () const
2631 {
2632         return Glib::build_filename (_path, plugins_dir_name);
2633 }
2634
2635 string
2636 Session::externals_dir () const
2637 {
2638         return Glib::build_filename (_path, externals_dir_name);
2639 }
2640
2641 int
2642 Session::load_bundles (XMLNode const & node)
2643 {
2644         XMLNodeList nlist = node.children();
2645         XMLNodeConstIterator niter;
2646
2647         set_dirty();
2648
2649         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2650                 if ((*niter)->name() == "InputBundle") {
2651                         add_bundle (boost::shared_ptr<UserBundle> (new UserBundle (**niter, true)));
2652                 } else if ((*niter)->name() == "OutputBundle") {
2653                         add_bundle (boost::shared_ptr<UserBundle> (new UserBundle (**niter, false)));
2654                 } else {
2655                         error << string_compose(_("Unknown node \"%1\" found in Bundles list from session file"), (*niter)->name()) << endmsg;
2656                         return -1;
2657                 }
2658         }
2659
2660         return 0;
2661 }
2662
2663 int
2664 Session::load_route_groups (const XMLNode& node, int version)
2665 {
2666         XMLNodeList nlist = node.children();
2667         XMLNodeConstIterator niter;
2668
2669         set_dirty ();
2670
2671         if (version >= 3000) {
2672
2673                 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2674                         if ((*niter)->name() == "RouteGroup") {
2675                                 RouteGroup* rg = new RouteGroup (*this, "");
2676                                 add_route_group (rg);
2677                                 rg->set_state (**niter, version);
2678                         }
2679                 }
2680
2681         } else if (version < 3000) {
2682
2683                 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2684                         if ((*niter)->name() == "EditGroup" || (*niter)->name() == "MixGroup") {
2685                                 RouteGroup* rg = new RouteGroup (*this, "");
2686                                 add_route_group (rg);
2687                                 rg->set_state (**niter, version);
2688                         }
2689                 }
2690         }
2691
2692         return 0;
2693 }
2694
2695 static bool
2696 state_file_filter (const string &str, void* /*arg*/)
2697 {
2698         return (str.length() > strlen(statefile_suffix) &&
2699                 str.find (statefile_suffix) == (str.length() - strlen (statefile_suffix)));
2700 }
2701
2702 static string
2703 remove_end(string state)
2704 {
2705         string statename(state);
2706
2707         string::size_type start,end;
2708         if ((start = statename.find_last_of (G_DIR_SEPARATOR)) != string::npos) {
2709                 statename = statename.substr (start+1);
2710         }
2711
2712         if ((end = statename.rfind(statefile_suffix)) == string::npos) {
2713                 end = statename.length();
2714         }
2715
2716         return string(statename.substr (0, end));
2717 }
2718
2719 vector<string>
2720 Session::possible_states (string path)
2721 {
2722         vector<string> states;
2723         find_files_matching_filter (states, path, state_file_filter, 0, false, false);
2724
2725         transform(states.begin(), states.end(), states.begin(), remove_end);
2726
2727         sort (states.begin(), states.end());
2728
2729         return states;
2730 }
2731
2732 vector<string>
2733 Session::possible_states () const
2734 {
2735         return possible_states(_path);
2736 }
2737
2738 RouteGroup*
2739 Session::new_route_group (const std::string& name)
2740 {
2741         RouteGroup* rg = NULL;
2742
2743         for (std::list<RouteGroup*>::const_iterator i = _route_groups.begin (); i != _route_groups.end (); ++i) {
2744                 if ((*i)->name () == name) {
2745                         rg = *i;
2746                         break;
2747                 }
2748         }
2749
2750         if (!rg) {
2751                 rg = new RouteGroup (*this, name);
2752                 add_route_group (rg);
2753         }
2754         return (rg);
2755 }
2756
2757 void
2758 Session::add_route_group (RouteGroup* g)
2759 {
2760         _route_groups.push_back (g);
2761         route_group_added (g); /* EMIT SIGNAL */
2762
2763         g->RouteAdded.connect_same_thread (*this, boost::bind (&Session::route_added_to_route_group, this, _1, _2));
2764         g->RouteRemoved.connect_same_thread (*this, boost::bind (&Session::route_removed_from_route_group, this, _1, _2));
2765         g->PropertyChanged.connect_same_thread (*this, boost::bind (&Session::route_group_property_changed, this, g));
2766
2767         set_dirty ();
2768 }
2769
2770 void
2771 Session::remove_route_group (RouteGroup& rg)
2772 {
2773         list<RouteGroup*>::iterator i;
2774
2775         if ((i = find (_route_groups.begin(), _route_groups.end(), &rg)) != _route_groups.end()) {
2776                 _route_groups.erase (i);
2777                 delete &rg;
2778
2779                 route_group_removed (); /* EMIT SIGNAL */
2780         }
2781 }
2782
2783 /** Set a new order for our route groups, without adding or removing any.
2784  *  @param groups Route group list in the new order.
2785  */
2786 void
2787 Session::reorder_route_groups (list<RouteGroup*> groups)
2788 {
2789         _route_groups = groups;
2790
2791         route_groups_reordered (); /* EMIT SIGNAL */
2792         set_dirty ();
2793 }
2794
2795
2796 RouteGroup *
2797 Session::route_group_by_name (string name)
2798 {
2799         list<RouteGroup *>::iterator i;
2800
2801         for (i = _route_groups.begin(); i != _route_groups.end(); ++i) {
2802                 if ((*i)->name() == name) {
2803                         return* i;
2804                 }
2805         }
2806         return 0;
2807 }
2808
2809 RouteGroup&
2810 Session::all_route_group() const
2811 {
2812         return *_all_route_group;
2813 }
2814
2815 void
2816 Session::add_commands (vector<Command*> const & cmds)
2817 {
2818         for (vector<Command*>::const_iterator i = cmds.begin(); i != cmds.end(); ++i) {
2819                 add_command (*i);
2820         }
2821 }
2822
2823 void
2824 Session::add_command (Command* const cmd)
2825 {
2826         assert (_current_trans);
2827         DEBUG_UNDO_HISTORY (
2828             string_compose ("Current Undo Transaction %1, adding command: %2",
2829                             _current_trans->name (),
2830                             cmd->name ()));
2831         _current_trans->add_command (cmd);
2832 }
2833
2834 PBD::StatefulDiffCommand*
2835 Session::add_stateful_diff_command (boost::shared_ptr<PBD::StatefulDestructible> sfd)
2836 {
2837         PBD::StatefulDiffCommand* cmd = new PBD::StatefulDiffCommand (sfd);
2838         add_command (cmd);
2839         return cmd;
2840 }
2841
2842 void
2843 Session::begin_reversible_command (const string& name)
2844 {
2845         begin_reversible_command (g_quark_from_string (name.c_str ()));
2846 }
2847
2848 /** Begin a reversible command using a GQuark to identify it.
2849  *  begin_reversible_command() and commit_reversible_command() calls may be nested,
2850  *  but there must be as many begin...()s as there are commit...()s.
2851  */
2852 void
2853 Session::begin_reversible_command (GQuark q)
2854 {
2855         /* If nested begin/commit pairs are used, we create just one UndoTransaction
2856            to hold all the commands that are committed.  This keeps the order of
2857            commands correct in the history.
2858         */
2859
2860         if (_current_trans == 0) {
2861                 DEBUG_UNDO_HISTORY (string_compose (
2862                     "Begin Reversible Command, new transaction: %1", g_quark_to_string (q)));
2863
2864                 /* start a new transaction */
2865                 assert (_current_trans_quarks.empty ());
2866                 _current_trans = new UndoTransaction();
2867                 _current_trans->set_name (g_quark_to_string (q));
2868         } else {
2869                 DEBUG_UNDO_HISTORY (
2870                     string_compose ("Begin Reversible Command, current transaction: %1",
2871                                     _current_trans->name ()));
2872         }
2873
2874         _current_trans_quarks.push_front (q);
2875 }
2876
2877 void
2878 Session::abort_reversible_command ()
2879 {
2880         if (_current_trans != 0) {
2881                 DEBUG_UNDO_HISTORY (
2882                     string_compose ("Abort Reversible Command: %1", _current_trans->name ()));
2883                 _current_trans->clear();
2884                 delete _current_trans;
2885                 _current_trans = 0;
2886                 _current_trans_quarks.clear();
2887         }
2888 }
2889
2890 void
2891 Session::commit_reversible_command (Command *cmd)
2892 {
2893         assert (_current_trans);
2894         assert (!_current_trans_quarks.empty ());
2895
2896         struct timeval now;
2897
2898         if (cmd) {
2899                 DEBUG_UNDO_HISTORY (
2900                     string_compose ("Current Undo Transaction %1, adding command: %2",
2901                                     _current_trans->name (),
2902                                     cmd->name ()));
2903                 _current_trans->add_command (cmd);
2904         }
2905
2906         DEBUG_UNDO_HISTORY (
2907             string_compose ("Commit Reversible Command, current transaction: %1",
2908                             _current_trans->name ()));
2909
2910         _current_trans_quarks.pop_front ();
2911
2912         if (!_current_trans_quarks.empty ()) {
2913                 DEBUG_UNDO_HISTORY (
2914                     string_compose ("Commit Reversible Command, transaction is not "
2915                                     "top-level, current transaction: %1",
2916                                     _current_trans->name ()));
2917                 /* the transaction we're committing is not the top-level one */
2918                 return;
2919         }
2920
2921         if (_current_trans->empty()) {
2922                 /* no commands were added to the transaction, so just get rid of it */
2923                 DEBUG_UNDO_HISTORY (
2924                     string_compose ("Commit Reversible Command, No commands were "
2925                                     "added to current transaction: %1",
2926                                     _current_trans->name ()));
2927                 delete _current_trans;
2928                 _current_trans = 0;
2929                 return;
2930         }
2931
2932         gettimeofday (&now, 0);
2933         _current_trans->set_timestamp (now);
2934
2935         _history.add (_current_trans);
2936         _current_trans = 0;
2937 }
2938
2939 static bool
2940 accept_all_audio_files (const string& path, void* /*arg*/)
2941 {
2942         if (!Glib::file_test (path, Glib::FILE_TEST_IS_REGULAR)) {
2943                 return false;
2944         }
2945
2946         if (!AudioFileSource::safe_audio_file_extension (path)) {
2947                 return false;
2948         }
2949
2950         return true;
2951 }
2952
2953 static bool
2954 accept_all_midi_files (const string& path, void* /*arg*/)
2955 {
2956         if (!Glib::file_test (path, Glib::FILE_TEST_IS_REGULAR)) {
2957                 return false;
2958         }
2959
2960         return ((path.length() > 4 && path.find (".mid") != (path.length() - 4)) ||
2961                 (path.length() > 4 && path.find (".smf") != (path.length() - 4)) ||
2962                 (path.length() > 5 && path.find (".midi") != (path.length() - 5)));
2963 }
2964
2965 static bool
2966 accept_all_state_files (const string& path, void* /*arg*/)
2967 {
2968         if (!Glib::file_test (path, Glib::FILE_TEST_IS_REGULAR)) {
2969                 return false;
2970         }
2971
2972         std::string const statefile_ext (statefile_suffix);
2973         if (path.length() >= statefile_ext.length()) {
2974                 return (0 == path.compare (path.length() - statefile_ext.length(), statefile_ext.length(), statefile_ext));
2975         } else {
2976                 return false;
2977         }
2978 }
2979
2980 int
2981 Session::find_all_sources (string path, set<string>& result)
2982 {
2983         XMLTree tree;
2984         XMLNode* node;
2985
2986         if (!tree.read (path)) {
2987                 return -1;
2988         }
2989
2990         if ((node = find_named_node (*tree.root(), "Sources")) == 0) {
2991                 return -2;
2992         }
2993
2994         XMLNodeList nlist;
2995         XMLNodeConstIterator niter;
2996
2997         nlist = node->children();
2998
2999         set_dirty();
3000
3001         for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
3002
3003                 XMLProperty const * prop;
3004
3005                 if ((prop = (*niter)->property (X_("type"))) == 0) {
3006                         continue;
3007                 }
3008
3009                 DataType type (prop->value());
3010
3011                 if ((prop = (*niter)->property (X_("name"))) == 0) {
3012                         continue;
3013                 }
3014
3015                 if (Glib::path_is_absolute (prop->value())) {
3016                         /* external file, ignore */
3017                         continue;
3018                 }
3019
3020                 string found_path;
3021                 bool is_new;
3022                 uint16_t chan;
3023
3024                 if (FileSource::find (*this, type, prop->value(), true, is_new, chan, found_path)) {
3025                         result.insert (found_path);
3026                 }
3027         }
3028
3029         return 0;
3030 }
3031
3032 int
3033 Session::find_all_sources_across_snapshots (set<string>& result, bool exclude_this_snapshot)
3034 {
3035         vector<string> state_files;
3036         string ripped;
3037         string this_snapshot_path;
3038
3039         result.clear ();
3040
3041         ripped = _path;
3042
3043         if (ripped[ripped.length()-1] == G_DIR_SEPARATOR) {
3044                 ripped = ripped.substr (0, ripped.length() - 1);
3045         }
3046
3047         find_files_matching_filter (state_files, ripped, accept_all_state_files, (void *) 0, true, true);
3048
3049         if (state_files.empty()) {
3050                 /* impossible! */
3051                 return 0;
3052         }
3053
3054         this_snapshot_path = Glib::build_filename (_path, legalize_for_path (_current_snapshot_name));
3055         this_snapshot_path += statefile_suffix;
3056
3057         for (vector<string>::iterator i = state_files.begin(); i != state_files.end(); ++i) {
3058
3059                 cerr << "Looking at snapshot " << (*i) << " ( with this = [" << this_snapshot_path << "])\n";
3060
3061                 if (exclude_this_snapshot && *i == this_snapshot_path) {
3062                         cerr << "\texcluded\n";
3063                         continue;
3064
3065                 }
3066
3067                 if (find_all_sources (*i, result) < 0) {
3068                         return -1;
3069                 }
3070         }
3071
3072         return 0;
3073 }
3074
3075 struct RegionCounter {
3076     typedef std::map<PBD::ID,boost::shared_ptr<AudioSource> > AudioSourceList;
3077     AudioSourceList::iterator iter;
3078     boost::shared_ptr<Region> region;
3079     uint32_t count;
3080
3081     RegionCounter() : count (0) {}
3082 };
3083
3084 int
3085 Session::ask_about_playlist_deletion (boost::shared_ptr<Playlist> p)
3086 {
3087         boost::optional<int> r = AskAboutPlaylistDeletion (p);
3088         return r.get_value_or (1);
3089 }
3090
3091 void
3092 Session::cleanup_regions ()
3093 {
3094         bool removed = false;
3095         const RegionFactory::RegionMap& regions (RegionFactory::regions());
3096
3097         for (RegionFactory::RegionMap::const_iterator i = regions.begin(); i != regions.end();) {
3098
3099                 uint32_t used = playlists->region_use_count (i->second);
3100
3101                 if (used == 0 && !i->second->automatic ()) {
3102                         boost::weak_ptr<Region> w = i->second;
3103                         ++i;
3104                         removed = true;
3105                         RegionFactory::map_remove (w);
3106                 } else {
3107                         ++i;
3108                 }
3109         }
3110
3111         if (removed) {
3112                 // re-check to remove parent references of compound regions
3113                 for (RegionFactory::RegionMap::const_iterator i = regions.begin(); i != regions.end();) {
3114                         if (!(i->second->whole_file() && i->second->max_source_level() > 0)) {
3115                                 ++i;
3116                                 continue;
3117                         }
3118                         assert(boost::dynamic_pointer_cast<PlaylistSource>(i->second->source (0)) != 0);
3119                         if (0 == playlists->region_use_count (i->second)) {
3120                                 boost::weak_ptr<Region> w = i->second;
3121                                 ++i;
3122                                 RegionFactory::map_remove (w);
3123                         } else {
3124                                 ++i;
3125                         }
3126                 }
3127         }
3128
3129         /* dump the history list */
3130         _history.clear ();
3131
3132         save_state ("");
3133 }
3134
3135 bool
3136 Session::can_cleanup_peakfiles () const
3137 {
3138         if (deletion_in_progress()) {
3139                 return false;
3140         }
3141         if (!_writable || (_state_of_the_state & CannotSave)) {
3142                 warning << _("Cannot cleanup peak-files for read-only session.") << endmsg;
3143                 return false;
3144         }
3145         if (record_status() == Recording) {
3146                 error << _("Cannot cleanup peak-files while recording") << endmsg;
3147                 return false;
3148         }
3149         return true;
3150 }
3151
3152 int
3153 Session::cleanup_peakfiles ()
3154 {
3155         Glib::Threads::Mutex::Lock lm (peak_cleanup_lock, Glib::Threads::TRY_LOCK);
3156         if (!lm.locked()) {
3157                 return -1;
3158         }
3159
3160         assert (can_cleanup_peakfiles ());
3161         assert (!peaks_cleanup_in_progres());
3162
3163         _state_of_the_state = StateOfTheState (_state_of_the_state | PeakCleanup);
3164
3165         int timeout = 5000; // 5 seconds
3166         while (!SourceFactory::files_with_peaks.empty()) {
3167                 Glib::usleep (1000);
3168                 if (--timeout < 0) {
3169                         warning << _("Timeout waiting for peak-file creation to terminate before cleanup, please try again later.") << endmsg;
3170                         _state_of_the_state = StateOfTheState (_state_of_the_state & (~PeakCleanup));
3171                         return -1;
3172                 }
3173         }
3174
3175         for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
3176                 boost::shared_ptr<AudioSource> as;
3177                 if ((as = boost::dynamic_pointer_cast<AudioSource> (i->second)) != 0) {
3178                         as->close_peakfile();
3179                 }
3180         }
3181
3182         PBD::clear_directory (session_directory().peak_path());
3183
3184         _state_of_the_state = StateOfTheState (_state_of_the_state & (~PeakCleanup));
3185
3186         for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
3187                 boost::shared_ptr<AudioSource> as;
3188                 if ((as = boost::dynamic_pointer_cast<AudioSource> (i->second)) != 0) {
3189                         SourceFactory::setup_peakfile(as, true);
3190                 }
3191         }
3192         return 0;
3193 }
3194
3195 static void
3196 merge_all_sources (boost::shared_ptr<const Playlist> pl, std::set<boost::shared_ptr<Source> >* all_sources)
3197 {
3198         pl->deep_sources (*all_sources);
3199 }
3200
3201 int
3202 Session::cleanup_sources (CleanupReport& rep)
3203 {
3204         // FIXME: needs adaptation to midi
3205
3206         vector<boost::shared_ptr<Source> > dead_sources;
3207         string audio_path;
3208         string midi_path;
3209         vector<string> candidates;
3210         vector<string> unused;
3211         set<string> sources_used_by_all_snapshots;
3212         string spath;
3213         int ret = -1;
3214         string tmppath1;
3215         string tmppath2;
3216         Searchpath asp;
3217         Searchpath msp;
3218         set<boost::shared_ptr<Source> > sources_used_by_this_snapshot;
3219
3220         _state_of_the_state = (StateOfTheState) (_state_of_the_state | InCleanup);
3221
3222         /* this is mostly for windows which doesn't allow file
3223          * renaming if the file is in use. But we don't special
3224          * case it because we need to know if this causes
3225          * problems, and the easiest way to notice that is to
3226          * keep it in place for all platforms.
3227          */
3228
3229         request_stop (false);
3230         _butler->summon ();
3231         _butler->wait_until_finished ();
3232
3233         /* consider deleting all unused playlists */
3234
3235         if (playlists->maybe_delete_unused (boost::bind (Session::ask_about_playlist_deletion, _1))) {
3236                 ret = 0;
3237                 goto out;
3238         }
3239
3240         /* sync the "all regions" property of each playlist with its current state
3241          */
3242
3243         playlists->sync_all_regions_with_regions ();
3244
3245         /* find all un-used sources */
3246
3247         rep.paths.clear ();
3248         rep.space = 0;
3249
3250         for (SourceMap::iterator i = sources.begin(); i != sources.end(); ) {
3251
3252                 SourceMap::iterator tmp;
3253
3254                 tmp = i;
3255                 ++tmp;
3256
3257                 /* do not bother with files that are zero size, otherwise we remove the current "nascent"
3258                    capture files.
3259                 */
3260
3261                 if (!i->second->used() && (i->second->length(i->second->timeline_position()) > 0)) {
3262                         dead_sources.push_back (i->second);
3263                         i->second->drop_references ();
3264                 }
3265
3266                 i = tmp;
3267         }
3268
3269         /* build a list of all the possible audio directories for the session */
3270
3271         for (vector<space_and_path>::const_iterator i = session_dirs.begin(); i != session_dirs.end(); ++i) {
3272                 SessionDirectory sdir ((*i).path);
3273                 asp += sdir.sound_path();
3274         }
3275         audio_path += asp.to_string();
3276
3277
3278         /* build a list of all the possible midi directories for the session */
3279
3280         for (vector<space_and_path>::const_iterator i = session_dirs.begin(); i != session_dirs.end(); ++i) {
3281                 SessionDirectory sdir ((*i).path);
3282                 msp += sdir.midi_path();
3283         }
3284         midi_path += msp.to_string();
3285
3286         find_files_matching_filter (candidates, audio_path, accept_all_audio_files, (void *) 0, true, true);
3287         find_files_matching_filter (candidates, midi_path, accept_all_midi_files, (void *) 0, true, true);
3288
3289         /* add sources from all other snapshots as "used", but don't use this
3290            snapshot because the state file on disk still references sources we
3291            may have already dropped.
3292         */
3293
3294         find_all_sources_across_snapshots (sources_used_by_all_snapshots, true);
3295
3296         /* Although the region factory has a list of all regions ever created
3297          * for this session, we're only interested in regions actually in
3298          * playlists right now. So merge all playlist regions lists together.
3299          *
3300          * This will include the playlists used within compound regions.
3301          */
3302
3303         playlists->foreach (boost::bind (merge_all_sources, _1, &sources_used_by_this_snapshot));
3304
3305         /*  add our current source list
3306          */
3307
3308         for (SourceMap::iterator i = sources.begin(); i != sources.end(); ) {
3309                 boost::shared_ptr<FileSource> fs;
3310                 SourceMap::iterator tmp = i;
3311                 ++tmp;
3312
3313                 if ((fs = boost::dynamic_pointer_cast<FileSource> (i->second)) == 0) {
3314                         /* not a file */
3315                         i = tmp;
3316                         continue;
3317                 }
3318
3319                 /* this is mostly for windows which doesn't allow file
3320                  * renaming if the file is in use. But we do not special
3321                  * case it because we need to know if this causes
3322                  * problems, and the easiest way to notice that is to
3323                  * keep it in place for all platforms.
3324                  */
3325
3326                 fs->close ();
3327
3328                 if (!fs->is_stub()) {
3329
3330                         /* Note that we're checking a list of all
3331                          * sources across all snapshots with the list
3332                          * of sources used by this snapshot.
3333                          */
3334
3335                         if (sources_used_by_this_snapshot.find (i->second) != sources_used_by_this_snapshot.end()) {
3336                                 /* this source is in use by this snapshot */
3337                                 sources_used_by_all_snapshots.insert (fs->path());
3338                                 cerr << "Source from source list found in used_by_this_snapshot (" << fs->path() << ")\n";
3339                         } else {
3340                                 cerr << "Source from source list NOT found in used_by_this_snapshot (" << fs->path() << ")\n";
3341                                 /* this source is NOT in use by this snapshot
3342                                  */
3343
3344                                 /* remove all related regions from RegionFactory master list
3345                                  */
3346
3347                                 RegionFactory::remove_regions_using_source (i->second);
3348
3349                                 /* remove from our current source list
3350                                  * also. We may not remove it from
3351                                  * disk, because it may be used by
3352                                  * other snapshots, but it isn't used inside this
3353                                  * snapshot anymore, so we don't need a
3354                                  * reference to it.
3355                                  */
3356
3357                                 sources.erase (i);
3358                         }
3359                 }
3360
3361                 i = tmp;
3362         }
3363
3364         /* now check each candidate source to see if it exists in the list of
3365            sources_used_by_all_snapshots. If it doesn't, put it into "unused".
3366         */
3367
3368         cerr << "Candidates: " << candidates.size() << endl;
3369         cerr << "Used by others: " << sources_used_by_all_snapshots.size() << endl;
3370
3371         for (vector<string>::iterator x = candidates.begin(); x != candidates.end(); ++x) {
3372
3373                 bool used = false;
3374                 spath = *x;
3375
3376                 for (set<string>::iterator i = sources_used_by_all_snapshots.begin(); i != sources_used_by_all_snapshots.end(); ++i) {
3377
3378                         tmppath1 = canonical_path (spath);
3379                         tmppath2 = canonical_path ((*i));
3380
3381                         cerr << "\t => " << tmppath2 << endl;
3382
3383                         if (tmppath1 == tmppath2) {
3384                                 used = true;
3385                                 break;
3386                         }
3387                 }
3388
3389                 if (!used) {
3390                         unused.push_back (spath);
3391                 }
3392         }
3393
3394         cerr << "Actually unused: " << unused.size() << endl;
3395
3396         if (unused.empty()) {
3397                 /* Nothing to do */
3398                 ret = 0;
3399                 goto out;
3400         }
3401
3402         /* now try to move all unused files into the "dead" directory(ies) */
3403
3404         for (vector<string>::iterator x = unused.begin(); x != unused.end(); ++x) {
3405                 GStatBuf statbuf;
3406
3407                 string newpath;
3408
3409                 /* don't move the file across filesystems, just
3410                    stick it in the `dead_dir_name' directory
3411                    on whichever filesystem it was already on.
3412                 */
3413
3414                 if ((*x).find ("/sounds/") != string::npos) {
3415
3416                         /* old school, go up 1 level */
3417
3418                         newpath = Glib::path_get_dirname (*x);      // "sounds"
3419                         newpath = Glib::path_get_dirname (newpath); // "session-name"
3420
3421                 } else {
3422
3423                         /* new school, go up 4 levels */
3424
3425                         newpath = Glib::path_get_dirname (*x);      // "audiofiles" or "midifiles"
3426                         newpath = Glib::path_get_dirname (newpath); // "session-name"
3427                         newpath = Glib::path_get_dirname (newpath); // "interchange"
3428                         newpath = Glib::path_get_dirname (newpath); // "session-dir"
3429                 }
3430
3431                 newpath = Glib::build_filename (newpath, dead_dir_name);
3432
3433                 if (g_mkdir_with_parents (newpath.c_str(), 0755) < 0) {
3434                         error << string_compose(_("Session: cannot create dead file folder \"%1\" (%2)"), newpath, strerror (errno)) << endmsg;
3435                         return -1;
3436                 }
3437
3438                 newpath = Glib::build_filename (newpath, Glib::path_get_basename ((*x)));
3439
3440                 if (Glib::file_test (newpath, Glib::FILE_TEST_EXISTS)) {
3441
3442                         /* the new path already exists, try versioning */
3443
3444                         char buf[PATH_MAX+1];
3445                         int version = 1;
3446                         string newpath_v;
3447
3448                         snprintf (buf, sizeof (buf), "%s.%d", newpath.c_str(), version);
3449                         newpath_v = buf;
3450
3451                         while (Glib::file_test (newpath_v.c_str(), Glib::FILE_TEST_EXISTS) && version < 999) {
3452                                 snprintf (buf, sizeof (buf), "%s.%d", newpath.c_str(), ++version);
3453                                 newpath_v = buf;
3454                         }
3455
3456                         if (version == 999) {
3457                                 error << string_compose (_("there are already 1000 files with names like %1; versioning discontinued"),
3458                                                   newpath)
3459                                       << endmsg;
3460                         } else {
3461                                 newpath = newpath_v;
3462                         }
3463
3464                 }
3465
3466                 if ((g_stat ((*x).c_str(), &statbuf) != 0) || (::g_rename ((*x).c_str(), newpath.c_str()) != 0)) {
3467                         error << string_compose (_("cannot rename unused file source from %1 to %2 (%3)"), (*x),
3468                                                  newpath, g_strerror (errno)) << endmsg;
3469                         continue;
3470                 }
3471
3472                 /* see if there an easy to find peakfile for this file, and remove it.
3473                  */
3474
3475                 string base = Glib::path_get_basename (*x);
3476                 base += "%A"; /* this is what we add for the channel suffix of all native files,
3477                                  or for the first channel of embedded files. it will miss
3478                                  some peakfiles for other channels
3479                                */
3480                 string peakpath = construct_peak_filepath (base);
3481
3482                 if (Glib::file_test (peakpath.c_str (), Glib::FILE_TEST_EXISTS)) {
3483                         if (::g_unlink (peakpath.c_str ()) != 0) {
3484                                 error << string_compose (_("cannot remove peakfile %1 for %2 (%3)"), peakpath, _path,
3485                                                          g_strerror (errno)) << endmsg;
3486                                 /* try to back out */
3487                                 ::g_rename (newpath.c_str (), _path.c_str ());
3488                                 goto out;
3489                         }
3490                 }
3491
3492                 rep.paths.push_back (*x);
3493                 rep.space += statbuf.st_size;
3494         }
3495
3496         /* dump the history list */
3497
3498         _history.clear ();
3499
3500         /* save state so we don't end up a session file
3501            referring to non-existent sources.
3502         */
3503
3504         save_state ("");
3505         ret = 0;
3506
3507   out:
3508         _state_of_the_state = (StateOfTheState) (_state_of_the_state & ~InCleanup);
3509
3510         return ret;
3511 }
3512
3513 int
3514 Session::cleanup_trash_sources (CleanupReport& rep)
3515 {
3516         // FIXME: needs adaptation for MIDI
3517
3518         vector<space_and_path>::iterator i;
3519         string dead_dir;
3520
3521         rep.paths.clear ();
3522         rep.space = 0;
3523
3524         for (i = session_dirs.begin(); i != session_dirs.end(); ++i) {
3525
3526                 dead_dir = Glib::build_filename ((*i).path, dead_dir_name);
3527
3528                 clear_directory (dead_dir, &rep.space, &rep.paths);
3529         }
3530
3531         return 0;
3532 }
3533
3534 void
3535 Session::set_dirty ()
3536 {
3537         /* return early if there's nothing to do */
3538         if (dirty ()) {
3539                 return;
3540         }
3541
3542         /* never mark session dirty during loading */
3543         if (_state_of_the_state & Loading) {
3544                 return;
3545         }
3546
3547         _state_of_the_state = StateOfTheState (_state_of_the_state | Dirty);
3548         DirtyChanged(); /* EMIT SIGNAL */
3549 }
3550
3551 void
3552 Session::set_clean ()
3553 {
3554         bool was_dirty = dirty();
3555
3556         _state_of_the_state = Clean;
3557
3558         if (was_dirty) {
3559                 DirtyChanged(); /* EMIT SIGNAL */
3560         }
3561 }
3562
3563 void
3564 Session::set_deletion_in_progress ()
3565 {
3566         _state_of_the_state = StateOfTheState (_state_of_the_state | Deletion);
3567 }
3568
3569 void
3570 Session::clear_deletion_in_progress ()
3571 {
3572         _state_of_the_state = StateOfTheState (_state_of_the_state & (~Deletion));
3573 }
3574
3575 void
3576 Session::add_controllable (boost::shared_ptr<Controllable> c)
3577 {
3578         /* this adds a controllable to the list managed by the Session.
3579            this is a subset of those managed by the Controllable class
3580            itself, and represents the only ones whose state will be saved
3581            as part of the session.
3582         */
3583
3584         Glib::Threads::Mutex::Lock lm (controllables_lock);
3585         controllables.insert (c);
3586 }
3587
3588 struct null_deleter { void operator()(void const *) const {} };
3589
3590 void
3591 Session::remove_controllable (Controllable* c)
3592 {
3593         if (_state_of_the_state & Deletion) {
3594                 return;
3595         }
3596
3597         Glib::Threads::Mutex::Lock lm (controllables_lock);
3598
3599         Controllables::iterator x = controllables.find (boost::shared_ptr<Controllable>(c, null_deleter()));
3600
3601         if (x != controllables.end()) {
3602                 controllables.erase (x);
3603         }
3604 }
3605
3606 boost::shared_ptr<Controllable>
3607 Session::controllable_by_id (const PBD::ID& id)
3608 {
3609         Glib::Threads::Mutex::Lock lm (controllables_lock);
3610
3611         for (Controllables::iterator i = controllables.begin(); i != controllables.end(); ++i) {
3612                 if ((*i)->id() == id) {
3613                         return *i;
3614                 }
3615         }
3616
3617         return boost::shared_ptr<Controllable>();
3618 }
3619
3620 boost::shared_ptr<Controllable>
3621 Session::controllable_by_descriptor (const ControllableDescriptor& desc)
3622 {
3623         boost::shared_ptr<Controllable> c;
3624         boost::shared_ptr<Stripable> s;
3625         boost::shared_ptr<Route> r;
3626
3627         switch (desc.top_level_type()) {
3628         case ControllableDescriptor::NamedRoute:
3629         {
3630                 std::string str = desc.top_level_name();
3631
3632                 if (str == "Master" || str == "master") {
3633                         s = _master_out;
3634                 } else if (str == "control" || str == "listen" || str == "monitor" || str == "Monitor") {
3635                         s = _monitor_out;
3636                 } else if (str == "auditioner") {
3637                         s = auditioner;
3638                 } else {
3639                         s = route_by_name (desc.top_level_name());
3640                 }
3641
3642                 break;
3643         }
3644
3645         case ControllableDescriptor::PresentationOrderRoute:
3646                 s = get_remote_nth_stripable (desc.presentation_order(), PresentationInfo::Route);
3647                 break;
3648
3649         case ControllableDescriptor::PresentationOrderTrack:
3650                 s = get_remote_nth_stripable (desc.presentation_order(), PresentationInfo::Track);
3651                 break;
3652
3653         case ControllableDescriptor::PresentationOrderBus:
3654                 s = get_remote_nth_stripable (desc.presentation_order(), PresentationInfo::Bus);
3655                 break;
3656
3657         case ControllableDescriptor::PresentationOrderVCA:
3658                 s = get_remote_nth_stripable (desc.presentation_order(), PresentationInfo::VCA);
3659                 break;
3660
3661         case ControllableDescriptor::SelectionCount:
3662                 s = route_by_selected_count (desc.selection_id());
3663                 break;
3664         }
3665
3666         if (!s) {
3667                 return c;
3668         }
3669
3670         r = boost::dynamic_pointer_cast<Route> (s);
3671
3672         switch (desc.subtype()) {
3673         case ControllableDescriptor::Gain:
3674                 c = s->gain_control ();
3675                 break;
3676
3677         case ControllableDescriptor::Trim:
3678                 c = s->trim_control ();
3679                 break;
3680
3681         case ControllableDescriptor::Solo:
3682                 c = s->solo_control();
3683                 break;
3684
3685         case ControllableDescriptor::Mute:
3686                 c = s->mute_control();
3687                 break;
3688
3689         case ControllableDescriptor::Recenable:
3690                 c = s->rec_enable_control ();
3691                 break;
3692
3693         case ControllableDescriptor::PanDirection:
3694                 c = s->pan_azimuth_control();
3695                 break;
3696
3697         case ControllableDescriptor::PanWidth:
3698                 c = s->pan_width_control();
3699                 break;
3700
3701         case ControllableDescriptor::PanElevation:
3702                 c = s->pan_elevation_control();
3703                 break;
3704
3705         case ControllableDescriptor::Balance:
3706                 /* XXX simple pan control */
3707                 break;
3708
3709         case ControllableDescriptor::PluginParameter:
3710         {
3711                 uint32_t plugin = desc.target (0);
3712                 uint32_t parameter_index = desc.target (1);
3713
3714                 /* revert to zero based counting */
3715
3716                 if (plugin > 0) {
3717                         --plugin;
3718                 }
3719
3720                 if (parameter_index > 0) {
3721                         --parameter_index;
3722                 }
3723
3724                 if (!r) {
3725                         return c;
3726                 }
3727
3728                 boost::shared_ptr<Processor> p = r->nth_plugin (plugin);
3729
3730                 if (p) {
3731                         c = boost::dynamic_pointer_cast<ARDOUR::AutomationControl>(
3732                                 p->control(Evoral::Parameter(PluginAutomation, 0, parameter_index)));
3733                 }
3734                 break;
3735         }
3736
3737         case ControllableDescriptor::SendGain: {
3738                 uint32_t send = desc.target (0);
3739                 if (send > 0) {
3740                         --send;
3741                 }
3742                 if (!r) {
3743                         return c;
3744                 }
3745                 c = r->send_level_controllable (send);
3746                 break;
3747         }
3748
3749         default:
3750                 /* relax and return a null pointer */
3751                 break;
3752         }
3753
3754         return c;
3755 }
3756
3757 void
3758 Session::add_instant_xml (XMLNode& node, bool write_to_config)
3759 {
3760         if (_writable) {
3761                 Stateful::add_instant_xml (node, _path);
3762         }
3763
3764         if (write_to_config) {
3765                 Config->add_instant_xml (node);
3766         }
3767 }
3768
3769 XMLNode*
3770 Session::instant_xml (const string& node_name)
3771 {
3772 #ifdef MIXBUS // "Safe Mode" (shift + click open) -> also ignore instant.xml
3773         if (get_disable_all_loaded_plugins ()) {
3774                 return NULL;
3775         }
3776 #endif
3777         return Stateful::instant_xml (node_name, _path);
3778 }
3779
3780 int
3781 Session::save_history (string snapshot_name)
3782 {
3783         XMLTree tree;
3784
3785         if (!_writable) {
3786                 return 0;
3787         }
3788
3789         if (!Config->get_save_history() || Config->get_saved_history_depth() < 0 ||
3790             (_history.undo_depth() == 0 && _history.redo_depth() == 0)) {
3791                 return 0;
3792         }
3793
3794         if (snapshot_name.empty()) {
3795                 snapshot_name = _current_snapshot_name;
3796         }
3797
3798         const string history_filename = legalize_for_path (snapshot_name) + history_suffix;
3799         const string backup_filename = history_filename + backup_suffix;
3800         const std::string xml_path(Glib::build_filename (_session_dir->root_path(), history_filename));
3801         const std::string backup_path(Glib::build_filename (_session_dir->root_path(), backup_filename));
3802
3803         if (Glib::file_test (xml_path, Glib::FILE_TEST_EXISTS)) {
3804                 if (::g_rename (xml_path.c_str(), backup_path.c_str()) != 0) {
3805                         error << _("could not backup old history file, current history not saved") << endmsg;
3806                         return -1;
3807                 }
3808         }
3809
3810         tree.set_root (&_history.get_state (Config->get_saved_history_depth()));
3811
3812         if (!tree.write (xml_path))
3813         {
3814                 error << string_compose (_("history could not be saved to %1"), xml_path) << endmsg;
3815
3816                 if (g_remove (xml_path.c_str()) != 0) {
3817                         error << string_compose(_("Could not remove history file at path \"%1\" (%2)"),
3818                                         xml_path, g_strerror (errno)) << endmsg;
3819                 }
3820                 if (::g_rename (backup_path.c_str(), xml_path.c_str()) != 0) {
3821                         error << string_compose (_("could not restore history file from backup %1 (%2)"),
3822                                         backup_path, g_strerror (errno)) << endmsg;
3823                 }
3824
3825                 return -1;
3826         }
3827
3828         return 0;
3829 }
3830
3831 int
3832 Session::restore_history (string snapshot_name)
3833 {
3834         XMLTree tree;
3835
3836         if (snapshot_name.empty()) {
3837                 snapshot_name = _current_snapshot_name;
3838         }
3839
3840         const std::string xml_filename = legalize_for_path (snapshot_name) + history_suffix;
3841         const std::string xml_path(Glib::build_filename (_session_dir->root_path(), xml_filename));
3842
3843         info << "Loading history from " << xml_path << endmsg;
3844
3845         if (!Glib::file_test (xml_path, Glib::FILE_TEST_EXISTS)) {
3846                 info << string_compose (_("%1: no history file \"%2\" for this session."),
3847                                 _name, xml_path) << endmsg;
3848                 return 1;
3849         }
3850
3851         if (!tree.read (xml_path)) {
3852                 error << string_compose (_("Could not understand session history file \"%1\""),
3853                                 xml_path) << endmsg;
3854                 return -1;
3855         }
3856
3857         // replace history
3858         _history.clear();
3859
3860         for (XMLNodeConstIterator it  = tree.root()->children().begin(); it != tree.root()->children().end(); ++it) {
3861
3862                 XMLNode *t = *it;
3863                 UndoTransaction* ut = new UndoTransaction ();
3864                 struct timeval tv;
3865
3866                 ut->set_name(t->property("name")->value());
3867                 stringstream ss(t->property("tv-sec")->value());
3868                 ss >> tv.tv_sec;
3869                 ss.str(t->property("tv-usec")->value());
3870                 ss >> tv.tv_usec;
3871                 ut->set_timestamp(tv);
3872
3873                 for (XMLNodeConstIterator child_it  = t->children().begin();
3874                                 child_it != t->children().end(); child_it++)
3875                 {
3876                         XMLNode *n = *child_it;
3877                         Command *c;
3878
3879                         if (n->name() == "MementoCommand" ||
3880                                         n->name() == "MementoUndoCommand" ||
3881                                         n->name() == "MementoRedoCommand") {
3882
3883                                 if ((c = memento_command_factory(n))) {
3884                                         ut->add_command(c);
3885                                 }
3886
3887                         } else if (n->name() == "NoteDiffCommand") {
3888                                 PBD::ID id (n->property("midi-source")->value());
3889                                 boost::shared_ptr<MidiSource> midi_source =
3890                                         boost::dynamic_pointer_cast<MidiSource, Source>(source_by_id(id));
3891                                 if (midi_source) {
3892                                         ut->add_command (new MidiModel::NoteDiffCommand(midi_source->model(), *n));
3893                                 } else {
3894                                         error << _("Failed to downcast MidiSource for NoteDiffCommand") << endmsg;
3895                                 }
3896
3897                         } else if (n->name() == "SysExDiffCommand") {
3898
3899                                 PBD::ID id (n->property("midi-source")->value());
3900                                 boost::shared_ptr<MidiSource> midi_source =
3901                                         boost::dynamic_pointer_cast<MidiSource, Source>(source_by_id(id));
3902                                 if (midi_source) {
3903                                         ut->add_command (new MidiModel::SysExDiffCommand (midi_source->model(), *n));
3904                                 } else {
3905                                         error << _("Failed to downcast MidiSource for SysExDiffCommand") << endmsg;
3906                                 }
3907
3908                         } else if (n->name() == "PatchChangeDiffCommand") {
3909
3910                                 PBD::ID id (n->property("midi-source")->value());
3911                                 boost::shared_ptr<MidiSource> midi_source =
3912                                         boost::dynamic_pointer_cast<MidiSource, Source>(source_by_id(id));
3913                                 if (midi_source) {
3914                                         ut->add_command (new MidiModel::PatchChangeDiffCommand (midi_source->model(), *n));
3915                                 } else {
3916                                         error << _("Failed to downcast MidiSource for PatchChangeDiffCommand") << endmsg;
3917                                 }
3918
3919                         } else if (n->name() == "StatefulDiffCommand") {
3920                                 if ((c = stateful_diff_command_factory (n))) {
3921                                         ut->add_command (c);
3922                                 }
3923                         } else {
3924                                 error << string_compose(_("Couldn't figure out how to make a Command out of a %1 XMLNode."), n->name()) << endmsg;
3925                         }
3926                 }
3927
3928                 _history.add (ut);
3929         }
3930
3931         return 0;
3932 }
3933
3934 void
3935 Session::config_changed (std::string p, bool ours)
3936 {
3937         if (ours) {
3938                 set_dirty ();
3939         }
3940
3941         if (p == "seamless-loop") {
3942
3943         } else if (p == "rf-speed") {
3944
3945         } else if (p == "auto-loop") {
3946
3947         } else if (p == "session-monitoring") {
3948
3949         } else if (p == "auto-input") {
3950
3951                 if (Config->get_monitoring_model() == HardwareMonitoring && transport_rolling()) {
3952                         /* auto-input only makes a difference if we're rolling */
3953                         set_track_monitor_input_status (!config.get_auto_input());
3954                 }
3955
3956         } else if (p == "punch-in") {
3957
3958                 Location* location;
3959
3960                 if ((location = _locations->auto_punch_location()) != 0) {
3961
3962                         if (config.get_punch_in ()) {
3963                                 replace_event (SessionEvent::PunchIn, location->start());
3964                         } else {
3965                                 remove_event (location->start(), SessionEvent::PunchIn);
3966                         }
3967                 }
3968
3969         } else if (p == "punch-out") {
3970
3971                 Location* location;
3972
3973                 if ((location = _locations->auto_punch_location()) != 0) {
3974
3975                         if (config.get_punch_out()) {
3976                                 replace_event (SessionEvent::PunchOut, location->end());
3977                         } else {
3978                                 clear_events (SessionEvent::PunchOut);
3979                         }
3980                 }
3981
3982         } else if (p == "edit-mode") {
3983
3984                 Glib::Threads::Mutex::Lock lm (playlists->lock);
3985
3986                 for (SessionPlaylists::List::iterator i = playlists->playlists.begin(); i != playlists->playlists.end(); ++i) {
3987                         (*i)->set_edit_mode (Config->get_edit_mode ());
3988                 }
3989
3990         } else if (p == "use-video-sync") {
3991
3992                 waiting_for_sync_offset = config.get_use_video_sync();
3993
3994         } else if (p == "mmc-control") {
3995
3996                 //poke_midi_thread ();
3997
3998         } else if (p == "mmc-device-id" || p == "mmc-receive-id" || p == "mmc-receive-device-id") {
3999
4000                 _mmc->set_receive_device_id (Config->get_mmc_receive_device_id());
4001
4002         } else if (p == "mmc-send-id" || p == "mmc-send-device-id") {
4003
4004                 _mmc->set_send_device_id (Config->get_mmc_send_device_id());
4005
4006         } else if (p == "midi-control") {
4007
4008                 //poke_midi_thread ();
4009
4010         } else if (p == "raid-path") {
4011
4012                 setup_raid_path (config.get_raid_path());
4013
4014         } else if (p == "timecode-format") {
4015
4016                 sync_time_vars ();
4017
4018         } else if (p == "video-pullup") {
4019
4020                 sync_time_vars ();
4021
4022         } else if (p == "seamless-loop") {
4023
4024                 if (play_loop && transport_rolling()) {
4025                         // to reset diskstreams etc
4026                         request_play_loop (true);
4027                 }
4028
4029         } else if (p == "rf-speed") {
4030
4031                 cumulative_rf_motion = 0;
4032                 reset_rf_scale (0);
4033
4034         } else if (p == "click-sound") {
4035
4036                 setup_click_sounds (1);
4037
4038         } else if (p == "click-emphasis-sound") {
4039
4040                 setup_click_sounds (-1);
4041
4042         } else if (p == "clicking") {
4043
4044                 if (Config->get_clicking()) {
4045                         if (_click_io && click_data) { // don't require emphasis data
4046                                 _clicking = true;
4047                         }
4048                 } else {
4049                         _clicking = false;
4050                 }
4051
4052         } else if (p == "click-gain") {
4053
4054                 if (_click_gain) {
4055                         _click_gain->gain_control()->set_value (Config->get_click_gain(), Controllable::NoGroup);
4056                 }
4057
4058         } else if (p == "send-mtc") {
4059
4060                 if (Config->get_send_mtc ()) {
4061                         /* mark us ready to send */
4062                         next_quarter_frame_to_send = 0;
4063                 }
4064
4065         } else if (p == "send-mmc") {
4066
4067                 _mmc->enable_send (Config->get_send_mmc ());
4068
4069         } else if (p == "jack-time-master") {
4070
4071                 engine().reset_timebase ();
4072
4073         } else if (p == "native-file-header-format") {
4074
4075                 if (!first_file_header_format_reset) {
4076                         reset_native_file_format ();
4077                 }
4078
4079                 first_file_header_format_reset = false;
4080
4081         } else if (p == "native-file-data-format") {
4082
4083                 if (!first_file_data_format_reset) {
4084                         reset_native_file_format ();
4085                 }
4086
4087                 first_file_data_format_reset = false;
4088
4089         } else if (p == "external-sync") {
4090                 if (!config.get_external_sync()) {
4091                         drop_sync_source ();
4092                 } else {
4093                         switch_to_sync_source (Config->get_sync_source());
4094                 }
4095         }  else if (p == "denormal-model") {
4096                 setup_fpu ();
4097         } else if (p == "history-depth") {
4098                 set_history_depth (Config->get_history_depth());
4099         } else if (p == "remote-model") {
4100                 /* XXX DO SOMETHING HERE TO TELL THE GUI THAT WE NEED
4101                    TO SET REMOTE ID'S
4102                 */
4103         } else if (p == "initial-program-change") {
4104
4105                 if (_mmc->output_port() && Config->get_initial_program_change() >= 0) {
4106                         MIDI::byte buf[2];
4107
4108                         buf[0] = MIDI::program; // channel zero by default
4109                         buf[1] = (Config->get_initial_program_change() & 0x7f);
4110
4111                         _mmc->output_port()->midimsg (buf, sizeof (buf), 0);
4112                 }
4113         } else if (p == "solo-mute-override") {
4114                 // catch_up_on_solo_mute_override ();
4115         } else if (p == "listen-position" || p == "pfl-position") {
4116                 listen_position_changed ();
4117         } else if (p == "solo-control-is-listen-control") {
4118                 solo_control_mode_changed ();
4119         } else if (p == "solo-mute-gain") {
4120                 _solo_cut_control->Changed (true, Controllable::NoGroup);
4121         } else if (p == "timecode-offset" || p == "timecode-offset-negative") {
4122                 last_timecode_valid = false;
4123         } else if (p == "playback-buffer-seconds") {
4124                 AudioSource::allocate_working_buffers (frame_rate());
4125         } else if (p == "ltc-source-port") {
4126                 reconnect_ltc_input ();
4127         } else if (p == "ltc-sink-port") {
4128                 reconnect_ltc_output ();
4129         } else if (p == "timecode-generator-offset") {
4130                 ltc_tx_parse_offset();
4131         } else if (p == "auto-return-target-list") {
4132                 follow_playhead_priority ();
4133         }
4134
4135         set_dirty ();
4136 }
4137
4138 void
4139 Session::set_history_depth (uint32_t d)
4140 {
4141         _history.set_depth (d);
4142 }
4143
4144 int
4145 Session::load_diskstreams_2X (XMLNode const & node, int)
4146 {
4147         XMLNodeList          clist;
4148         XMLNodeConstIterator citer;
4149
4150         clist = node.children();
4151
4152         for (citer = clist.begin(); citer != clist.end(); ++citer) {
4153
4154                 try {
4155                         /* diskstreams added automatically by DiskstreamCreated handler */
4156                         if ((*citer)->name() == "AudioDiskstream" || (*citer)->name() == "DiskStream") {
4157                                 boost::shared_ptr<AudioDiskstream> dsp (new AudioDiskstream (*this, **citer));
4158                                 _diskstreams_2X.push_back (dsp);
4159                         } else {
4160                                 error << _("Session: unknown diskstream type in XML") << endmsg;
4161                         }
4162                 }
4163
4164                 catch (failed_constructor& err) {
4165                         error << _("Session: could not load diskstream via XML state") << endmsg;
4166                         return -1;
4167                 }
4168         }
4169
4170         return 0;
4171 }
4172
4173 /** Connect things to the MMC object */
4174 void
4175 Session::setup_midi_machine_control ()
4176 {
4177         _mmc = new MIDI::MachineControl;
4178
4179         boost::shared_ptr<AsyncMIDIPort> async_in = boost::dynamic_pointer_cast<AsyncMIDIPort> (_midi_ports->mmc_input_port());
4180         boost::shared_ptr<AsyncMIDIPort> async_out = boost::dynamic_pointer_cast<AsyncMIDIPort> (_midi_ports->mmc_output_port());
4181
4182         if (!async_out || !async_out) {
4183                 return;
4184         }
4185
4186         /* XXXX argh, passing raw pointers back into libmidi++ */
4187
4188         MIDI::Port* mmc_in = async_in.get();
4189         MIDI::Port* mmc_out = async_out.get();
4190
4191         _mmc->set_ports (mmc_in, mmc_out);
4192
4193         _mmc->Play.connect_same_thread (*this, boost::bind (&Session::mmc_deferred_play, this, _1));
4194         _mmc->DeferredPlay.connect_same_thread (*this, boost::bind (&Session::mmc_deferred_play, this, _1));
4195         _mmc->Stop.connect_same_thread (*this, boost::bind (&Session::mmc_stop, this, _1));
4196         _mmc->FastForward.connect_same_thread (*this, boost::bind (&Session::mmc_fast_forward, this, _1));
4197         _mmc->Rewind.connect_same_thread (*this, boost::bind (&Session::mmc_rewind, this, _1));
4198         _mmc->Pause.connect_same_thread (*this, boost::bind (&Session::mmc_pause, this, _1));
4199         _mmc->RecordPause.connect_same_thread (*this, boost::bind (&Session::mmc_record_pause, this, _1));
4200         _mmc->RecordStrobe.connect_same_thread (*this, boost::bind (&Session::mmc_record_strobe, this, _1));
4201         _mmc->RecordExit.connect_same_thread (*this, boost::bind (&Session::mmc_record_exit, this, _1));
4202         _mmc->Locate.connect_same_thread (*this, boost::bind (&Session::mmc_locate, this, _1, _2));
4203         _mmc->Step.connect_same_thread (*this, boost::bind (&Session::mmc_step, this, _1, _2));
4204         _mmc->Shuttle.connect_same_thread (*this, boost::bind (&Session::mmc_shuttle, this, _1, _2, _3));
4205         _mmc->TrackRecordStatusChange.connect_same_thread (*this, boost::bind (&Session::mmc_record_enable, this, _1, _2, _3));
4206
4207         /* also handle MIDI SPP because its so common */
4208
4209         _mmc->SPPStart.connect_same_thread (*this, boost::bind (&Session::spp_start, this));
4210         _mmc->SPPContinue.connect_same_thread (*this, boost::bind (&Session::spp_continue, this));
4211         _mmc->SPPStop.connect_same_thread (*this, boost::bind (&Session::spp_stop, this));
4212 }
4213
4214 boost::shared_ptr<Controllable>
4215 Session::solo_cut_control() const
4216 {
4217         /* the solo cut control is a bit of an anomaly, at least as of Febrary 2011. There are no other
4218            controls in Ardour that currently get presented to the user in the GUI that require
4219            access as a Controllable and are also NOT owned by some SessionObject (e.g. Route, or MonitorProcessor).
4220
4221            its actually an RCConfiguration parameter, so we use a ProxyControllable to wrap
4222            it up as a Controllable. Changes to the Controllable will just map back to the RCConfiguration
4223            parameter.
4224         */
4225
4226         return _solo_cut_control;
4227 }
4228
4229 void
4230 Session::save_snapshot_name (const std::string & n)
4231 {
4232         /* assure Stateful::_instant_xml is loaded
4233          * add_instant_xml() only adds to existing data and defaults
4234          * to use an empty Tree otherwise
4235          */
4236         instant_xml ("LastUsedSnapshot");
4237
4238         XMLNode* last_used_snapshot = new XMLNode ("LastUsedSnapshot");
4239         last_used_snapshot->add_property ("name", string(n));
4240         add_instant_xml (*last_used_snapshot, false);
4241 }
4242
4243 void
4244 Session::set_snapshot_name (const std::string & n)
4245 {
4246         _current_snapshot_name = n;
4247         save_snapshot_name (n);
4248 }
4249
4250 int
4251 Session::rename (const std::string& new_name)
4252 {
4253         string legal_name = legalize_for_path (new_name);
4254         string new_path;
4255         string oldstr;
4256         string newstr;
4257         bool first = true;
4258
4259         string const old_sources_root = _session_dir->sources_root();
4260
4261         if (!_writable || (_state_of_the_state & CannotSave)) {
4262                 error << _("Cannot rename read-only session.") << endmsg;
4263                 return 0; // don't show "messed up" warning
4264         }
4265         if (record_status() == Recording) {
4266                 error << _("Cannot rename session while recording") << endmsg;
4267                 return 0; // don't show "messed up" warning
4268         }
4269
4270         StateProtector stp (this);
4271
4272         /* Rename:
4273
4274          * session directory
4275          * interchange subdirectory
4276          * session file
4277          * session history
4278
4279          * Backup files are left unchanged and not renamed.
4280          */
4281
4282         /* Windows requires that we close all files before attempting the
4283          * rename. This works on other platforms, but isn't necessary there.
4284          * Leave it in place for all platforms though, since it may help
4285          * catch issues that could arise if the way Source files work ever
4286          * change (since most developers are not using Windows).
4287          */
4288
4289         for (SourceMap::const_iterator i = sources.begin(); i != sources.end(); ++i) {
4290                 boost::shared_ptr<FileSource> fs = boost::dynamic_pointer_cast<FileSource> (i->second);
4291                 if (fs) {
4292                         fs->close ();
4293                 }
4294         }
4295
4296         /* pass one: not 100% safe check that the new directory names don't
4297          * already exist ...
4298          */
4299
4300         for (vector<space_and_path>::const_iterator i = session_dirs.begin(); i != session_dirs.end(); ++i) {
4301
4302                 oldstr = (*i).path;
4303
4304                 /* this is a stupid hack because Glib::path_get_dirname() is
4305                  * lexical-only, and so passing it /a/b/c/ gives a different
4306                  * result than passing it /a/b/c ...
4307                  */
4308
4309                 if (oldstr[oldstr.length()-1] == G_DIR_SEPARATOR) {
4310                         oldstr = oldstr.substr (0, oldstr.length() - 1);
4311                 }
4312
4313                 string base = Glib::path_get_dirname (oldstr);
4314
4315                 newstr = Glib::build_filename (base, legal_name);
4316
4317                 cerr << "Looking for " << newstr << endl;
4318
4319                 if (Glib::file_test (newstr, Glib::FILE_TEST_EXISTS)) {
4320                         cerr << " exists\n";
4321                         return -1;
4322                 }
4323         }
4324
4325         /* Session dirs */
4326
4327         first = true;
4328
4329         for (vector<space_and_path>::iterator i = session_dirs.begin(); i != session_dirs.end(); ++i) {
4330
4331                 vector<string> v;
4332
4333                 oldstr = (*i).path;
4334
4335                 /* this is a stupid hack because Glib::path_get_dirname() is
4336                  * lexical-only, and so passing it /a/b/c/ gives a different
4337                  * result than passing it /a/b/c ...
4338                  */
4339
4340                 if (oldstr[oldstr.length()-1] == G_DIR_SEPARATOR) {
4341                         oldstr = oldstr.substr (0, oldstr.length() - 1);
4342                 }
4343
4344                 string base = Glib::path_get_dirname (oldstr);
4345                 newstr = Glib::build_filename (base, legal_name);
4346
4347                 cerr << "for " << oldstr << " new dir = " << newstr << endl;
4348
4349                 cerr << "Rename " << oldstr << " => " << newstr << endl;
4350                 if (::g_rename (oldstr.c_str(), newstr.c_str()) != 0) {
4351                         cerr << string_compose (_("renaming %s as %2 failed (%3)"), oldstr, newstr, g_strerror (errno)) << endl;
4352                         error << string_compose (_("renaming %s as %2 failed (%3)"), oldstr, newstr, g_strerror (errno)) << endmsg;
4353                         return 1;
4354                 }
4355
4356                 /* Reset path in "session dirs" */
4357
4358                 (*i).path = newstr;
4359                 (*i).blocks = 0;
4360
4361                 /* reset primary SessionDirectory object */
4362
4363                 if (first) {
4364                         (*_session_dir) = newstr;
4365                         new_path = newstr;
4366                         first = false;
4367                 }
4368
4369                 /* now rename directory below session_dir/interchange */
4370
4371                 string old_interchange_dir;
4372                 string new_interchange_dir;
4373
4374                 /* use newstr here because we renamed the path
4375                  * (folder/directory) that used to be oldstr to newstr above
4376                  */
4377
4378                 v.push_back (newstr);
4379                 v.push_back (interchange_dir_name);
4380                 v.push_back (Glib::path_get_basename (oldstr));
4381
4382                 old_interchange_dir = Glib::build_filename (v);
4383
4384                 v.clear ();
4385                 v.push_back (newstr);
4386                 v.push_back (interchange_dir_name);
4387                 v.push_back (legal_name);
4388
4389                 new_interchange_dir = Glib::build_filename (v);
4390
4391                 cerr << "Rename " << old_interchange_dir << " => " << new_interchange_dir << endl;
4392
4393                 if (::g_rename (old_interchange_dir.c_str(), new_interchange_dir.c_str()) != 0) {
4394                         cerr << string_compose (_("renaming %s as %2 failed (%3)"),
4395                                                  old_interchange_dir, new_interchange_dir,
4396                                                  g_strerror (errno))
4397                               << endl;
4398                         error << string_compose (_("renaming %s as %2 failed (%3)"),
4399                                                  old_interchange_dir, new_interchange_dir,
4400                                                  g_strerror (errno))
4401                               << endmsg;
4402                         return 1;
4403                 }
4404         }
4405
4406         /* state file */
4407
4408         oldstr = Glib::build_filename (new_path, _current_snapshot_name + statefile_suffix);
4409         newstr= Glib::build_filename (new_path, legal_name + statefile_suffix);
4410
4411         cerr << "Rename " << oldstr << " => " << newstr << endl;
4412
4413         if (::g_rename (oldstr.c_str(), newstr.c_str()) != 0) {
4414                 cerr << string_compose (_("renaming %1 as %2 failed (%3)"), oldstr, newstr, g_strerror (errno)) << endl;
4415                 error << string_compose (_("renaming %1 as %2 failed (%3)"), oldstr, newstr, g_strerror (errno)) << endmsg;
4416                 return 1;
4417         }
4418
4419         /* history file */
4420
4421         oldstr = Glib::build_filename (new_path, _current_snapshot_name) + history_suffix;
4422
4423         if (Glib::file_test (oldstr, Glib::FILE_TEST_EXISTS))  {
4424                 newstr = Glib::build_filename (new_path, legal_name) + history_suffix;
4425
4426                 cerr << "Rename " << oldstr << " => " << newstr << endl;
4427
4428                 if (::g_rename (oldstr.c_str(), newstr.c_str()) != 0) {
4429                         cerr << string_compose (_("renaming %1 as %2 failed (%3)"), oldstr, newstr, g_strerror (errno)) << endl;
4430                         error << string_compose (_("renaming %1 as %2 failed (%3)"), oldstr, newstr, g_strerror (errno)) << endmsg;
4431                         return 1;
4432                 }
4433         }
4434
4435         /* remove old name from recent sessions */
4436         remove_recent_sessions (_path);
4437         _path = new_path;
4438
4439         /* update file source paths */
4440
4441         for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
4442                 boost::shared_ptr<FileSource> fs = boost::dynamic_pointer_cast<FileSource> (i->second);
4443                 if (fs) {
4444                         string p = fs->path ();
4445                         boost::replace_all (p, old_sources_root, _session_dir->sources_root());
4446                         fs->set_path (p);
4447                         SourceFactory::setup_peakfile(i->second, true);
4448                 }
4449         }
4450
4451         set_snapshot_name (new_name);
4452         _name = new_name;
4453
4454         set_dirty ();
4455
4456         /* save state again to get everything just right */
4457
4458         save_state (_current_snapshot_name);
4459
4460         /* add to recent sessions */
4461
4462         store_recent_sessions (new_name, _path);
4463
4464         return 0;
4465 }
4466
4467 int
4468 Session::get_info_from_path (const string& xmlpath, float& sample_rate, SampleFormat& data_format, std::string& program_version)
4469 {
4470         bool found_sr = false;
4471         bool found_data_format = false;
4472         program_version = "";
4473
4474         if (!Glib::file_test (xmlpath, Glib::FILE_TEST_EXISTS)) {
4475                 return -1;
4476         }
4477
4478         xmlParserCtxtPtr ctxt = xmlNewParserCtxt();
4479         if (ctxt == NULL) {
4480                 return -1;
4481         }
4482         xmlDocPtr doc = xmlCtxtReadFile (ctxt, xmlpath.c_str(), NULL, XML_PARSE_HUGE);
4483
4484         if (doc == NULL) {
4485                 xmlFreeParserCtxt(ctxt);
4486                 return -1;
4487         }
4488
4489         xmlNodePtr node = xmlDocGetRootElement(doc);
4490
4491         if (node == NULL) {
4492                 xmlFreeParserCtxt(ctxt);
4493                 xmlFreeDoc (doc);
4494                 return -1;
4495         }
4496
4497         /* sample rate */
4498
4499         xmlAttrPtr attr;
4500         for (attr = node->properties; attr; attr = attr->next) {
4501                 if (!strcmp ((const char*)attr->name, "sample-rate") && attr->children) {
4502                         sample_rate = atoi ((char*)attr->children->content);
4503                         found_sr = true;
4504                 }
4505         }
4506
4507         node = node->children;
4508         while (node != NULL) {
4509                  if (!strcmp((const char*) node->name, "ProgramVersion")) {
4510                          xmlChar* val = xmlGetProp (node, (const xmlChar*)"modified-with");
4511                          if (val) {
4512                                  program_version = string ((const char*)val);
4513                                  size_t sep = program_version.find_first_of("-");
4514                                  if (sep != string::npos) {
4515                                          program_version = program_version.substr (0, sep);
4516                                  }
4517                          }
4518                          xmlFree (val);
4519                  }
4520                  if (strcmp((const char*) node->name, "Config")) {
4521                          node = node->next;
4522                          continue;
4523                  }
4524                  for (node = node->children; node; node = node->next) {
4525                          xmlChar* pv = xmlGetProp (node, (const xmlChar*)"name");
4526                          if (pv && !strcmp ((const char*)pv, "native-file-data-format")) {
4527                                  xmlFree (pv);
4528                                  xmlChar* val = xmlGetProp (node, (const xmlChar*)"value");
4529                                  if (val) {
4530                                          SampleFormat fmt = (SampleFormat) string_2_enum (string ((const char*)val), fmt);
4531                                          data_format = fmt;
4532                                          found_data_format = true;
4533                                  }
4534                                  xmlFree (val);
4535                                  break;
4536                          }
4537                          xmlFree (pv);
4538                  }
4539                  break;
4540         }
4541
4542         xmlFreeParserCtxt(ctxt);
4543         xmlFreeDoc (doc);
4544
4545         return !(found_sr && found_data_format); // zero if they are both found
4546 }
4547
4548 std::string
4549 Session::get_snapshot_from_instant (const std::string& session_dir)
4550 {
4551         std::string instant_xml_path = Glib::build_filename (session_dir, "instant.xml");
4552
4553         if (!Glib::file_test (instant_xml_path, Glib::FILE_TEST_EXISTS)) {
4554                 return "";
4555         }
4556
4557         XMLTree tree;
4558         if (!tree.read (instant_xml_path)) {
4559                 return "";
4560         }
4561
4562         XMLProperty const * prop;
4563         XMLNode *last_used_snapshot = tree.root()->child("LastUsedSnapshot");
4564         if (last_used_snapshot && (prop = last_used_snapshot->property ("name")) != 0) {
4565                 return prop->value();
4566         }
4567
4568         return "";
4569 }
4570
4571 typedef std::vector<boost::shared_ptr<FileSource> > SeveralFileSources;
4572 typedef std::map<std::string,SeveralFileSources> SourcePathMap;
4573
4574 int
4575 Session::bring_all_sources_into_session (boost::function<void(uint32_t,uint32_t,string)> callback)
4576 {
4577         uint32_t total = 0;
4578         uint32_t n = 0;
4579         SourcePathMap source_path_map;
4580         string new_path;
4581         boost::shared_ptr<AudioFileSource> afs;
4582         int ret = 0;
4583
4584         {
4585
4586                 Glib::Threads::Mutex::Lock lm (source_lock);
4587
4588                 cerr << " total sources = " << sources.size();
4589
4590                 for (SourceMap::const_iterator i = sources.begin(); i != sources.end(); ++i) {
4591                         boost::shared_ptr<FileSource> fs = boost::dynamic_pointer_cast<FileSource> (i->second);
4592
4593                         if (!fs) {
4594                                 continue;
4595                         }
4596
4597                         if (fs->within_session()) {
4598                                 continue;
4599                         }
4600
4601                         if (source_path_map.find (fs->path()) != source_path_map.end()) {
4602                                 source_path_map[fs->path()].push_back (fs);
4603                         } else {
4604                                 SeveralFileSources v;
4605                                 v.push_back (fs);
4606                                 source_path_map.insert (make_pair (fs->path(), v));
4607                         }
4608
4609                         total++;
4610                 }
4611
4612                 cerr << " fsources = " << total << endl;
4613
4614                 for (SourcePathMap::iterator i = source_path_map.begin(); i != source_path_map.end(); ++i) {
4615
4616                         /* tell caller where we are */
4617
4618                         string old_path = i->first;
4619
4620                         callback (n, total, old_path);
4621
4622                         cerr << old_path << endl;
4623
4624                         new_path.clear ();
4625
4626                         switch (i->second.front()->type()) {
4627                         case DataType::AUDIO:
4628                                 new_path = new_audio_source_path_for_embedded (old_path);
4629                                 break;
4630
4631                         case DataType::MIDI:
4632                                 /* XXX not implemented yet */
4633                                 break;
4634                         }
4635
4636                         if (new_path.empty()) {
4637                                 continue;
4638                         }
4639
4640                         cerr << "Move " << old_path << " => " << new_path << endl;
4641
4642                         if (!copy_file (old_path, new_path)) {
4643                                 cerr << "failed !\n";
4644                                 ret = -1;
4645                         }
4646
4647                         /* make sure we stop looking in the external
4648                            dir/folder. Remember, this is an all-or-nothing
4649                            operations, it doesn't merge just some files.
4650                         */
4651                         remove_dir_from_search_path (Glib::path_get_dirname (old_path), i->second.front()->type());
4652
4653                         for (SeveralFileSources::iterator f = i->second.begin(); f != i->second.end(); ++f) {
4654                                 (*f)->set_path (new_path);
4655                         }
4656                 }
4657         }
4658
4659         save_state ("", false, false);
4660
4661         return ret;
4662 }
4663
4664 static
4665 bool accept_all_files (string const &, void *)
4666 {
4667         return true;
4668 }
4669
4670 void
4671 Session::save_as_bring_callback (uint32_t,uint32_t,string)
4672 {
4673         /* It would be good if this did something useful vis-a-vis save-as, but the arguments doesn't provide the correct information right now to do this.
4674         */
4675 }
4676
4677 static string
4678 make_new_media_path (string old_path, string new_session_folder, string new_session_path)
4679 {
4680         /* typedir is the "midifiles" or "audiofiles" etc. part of the path. */
4681
4682         string typedir = Glib::path_get_basename (Glib::path_get_dirname (old_path));
4683         vector<string> v;
4684         v.push_back (new_session_folder); /* full path */
4685         v.push_back (interchange_dir_name);
4686         v.push_back (new_session_path);   /* just one directory/folder */
4687         v.push_back (typedir);
4688         v.push_back (Glib::path_get_basename (old_path));
4689
4690         return Glib::build_filename (v);
4691 }
4692
4693 int
4694 Session::save_as (SaveAs& saveas)
4695 {
4696         vector<string> files;
4697         string current_folder = Glib::path_get_dirname (_path);
4698         string new_folder = legalize_for_path (saveas.new_name);
4699         string to_dir = Glib::build_filename (saveas.new_parent_folder, new_folder);
4700         int64_t total_bytes = 0;
4701         int64_t copied = 0;
4702         int64_t cnt = 0;
4703         int64_t all = 0;
4704         int32_t internal_file_cnt = 0;
4705
4706         vector<string> do_not_copy_extensions;
4707         do_not_copy_extensions.push_back (statefile_suffix);
4708         do_not_copy_extensions.push_back (pending_suffix);
4709         do_not_copy_extensions.push_back (backup_suffix);
4710         do_not_copy_extensions.push_back (temp_suffix);
4711         do_not_copy_extensions.push_back (history_suffix);
4712
4713         /* get total size */
4714
4715         for (vector<space_and_path>::const_iterator sd = session_dirs.begin(); sd != session_dirs.end(); ++sd) {
4716
4717                 /* need to clear this because
4718                  * find_files_matching_filter() is cumulative
4719                  */
4720
4721                 files.clear ();
4722
4723                 find_files_matching_filter (files, (*sd).path, accept_all_files, 0, false, true, true);
4724
4725                 all += files.size();
4726
4727                 for (vector<string>::iterator i = files.begin(); i != files.end(); ++i) {
4728                         GStatBuf gsb;
4729                         g_stat ((*i).c_str(), &gsb);
4730                         total_bytes += gsb.st_size;
4731                 }
4732         }
4733
4734         /* save old values so we can switch back if we are not switching to the new session */
4735
4736         string old_path = _path;
4737         string old_name = _name;
4738         string old_snapshot = _current_snapshot_name;
4739         string old_sd = _session_dir->root_path();
4740         vector<string> old_search_path[DataType::num_types];
4741         string old_config_search_path[DataType::num_types];
4742
4743         old_search_path[DataType::AUDIO] = source_search_path (DataType::AUDIO);
4744         old_search_path[DataType::MIDI] = source_search_path (DataType::MIDI);
4745         old_config_search_path[DataType::AUDIO]  = config.get_audio_search_path ();
4746         old_config_search_path[DataType::MIDI]  = config.get_midi_search_path ();
4747
4748         /* switch session directory */
4749
4750         (*_session_dir) = to_dir;
4751
4752         /* create new tree */
4753
4754         if (!_session_dir->create()) {
4755                 saveas.failure_message = string_compose (_("Cannot create new session folder %1"), to_dir);
4756                 return -1;
4757         }
4758
4759         try {
4760                 /* copy all relevant files. Find each location in session_dirs,
4761                  * and copy files from there to target.
4762                  */
4763
4764                 for (vector<space_and_path>::const_iterator sd = session_dirs.begin(); sd != session_dirs.end(); ++sd) {
4765
4766                         /* need to clear this because
4767                          * find_files_matching_filter() is cumulative
4768                          */
4769
4770                         files.clear ();
4771
4772                         const size_t prefix_len = (*sd).path.size();
4773
4774                         /* Work just on the files within this session dir */
4775
4776                         find_files_matching_filter (files, (*sd).path, accept_all_files, 0, false, true, true);
4777
4778                         /* add dir separator to protect against collisions with
4779                          * track names (e.g. track named "audiofiles" or
4780                          * "analysis".
4781                          */
4782
4783                         static const std::string audiofile_dir_string = string (sound_dir_name) + G_DIR_SEPARATOR;
4784                         static const std::string midifile_dir_string = string (midi_dir_name) + G_DIR_SEPARATOR;
4785                         static const std::string analysis_dir_string = analysis_dir() + G_DIR_SEPARATOR;
4786
4787                         /* copy all the files. Handling is different for media files
4788                            than others because of the *silly* subtree we have below the interchange
4789                            folder. That really was a bad idea, but I'm not fixing it as part of
4790                            implementing ::save_as().
4791                         */
4792
4793                         for (vector<string>::iterator i = files.begin(); i != files.end(); ++i) {
4794
4795                                 std::string from = *i;
4796
4797 #ifdef __APPLE__
4798                                 string filename = Glib::path_get_basename (from);
4799                                 std::transform (filename.begin(), filename.end(), filename.begin(), ::toupper);
4800                                 if (filename == ".DS_STORE") {
4801                                         continue;
4802                                 }
4803 #endif
4804
4805                                 if (from.find (audiofile_dir_string) != string::npos) {
4806
4807                                         /* audio file: only copy if asked */
4808
4809                                         if (saveas.include_media && saveas.copy_media) {
4810
4811                                                 string to = make_new_media_path (*i, to_dir, new_folder);
4812
4813                                                 info << "media file copying from " << from << " to " << to << endmsg;
4814
4815                                                 if (!copy_file (from, to)) {
4816                                                         throw Glib::FileError (Glib::FileError::IO_ERROR,
4817                                                                                                    string_compose(_("\ncopying \"%1\" failed !"), from));
4818                                                 }
4819                                         }
4820
4821                                         /* we found media files inside the session folder */
4822
4823                                         internal_file_cnt++;
4824
4825                                 } else if (from.find (midifile_dir_string) != string::npos) {
4826
4827                                         /* midi file: always copy unless
4828                                          * creating an empty new session
4829                                          */
4830
4831                                         if (saveas.include_media) {
4832
4833                                                 string to = make_new_media_path (*i, to_dir, new_folder);
4834
4835                                                 info << "media file copying from " << from << " to " << to << endmsg;
4836
4837                                                 if (!copy_file (from, to)) {
4838                                                         throw Glib::FileError (Glib::FileError::IO_ERROR, "copy failed");
4839                                                 }
4840                                         }
4841
4842                                         /* we found media files inside the session folder */
4843
4844                                         internal_file_cnt++;
4845
4846                                 } else if (from.find (analysis_dir_string) != string::npos) {
4847
4848                                         /*  make sure analysis dir exists in
4849                                          *  new session folder, but we're not
4850                                          *  copying analysis files here, see
4851                                          *  below
4852                                          */
4853
4854                                         (void) g_mkdir_with_parents (analysis_dir().c_str(), 775);
4855                                         continue;
4856
4857                                 } else {
4858
4859                                         /* normal non-media file. Don't copy state, history, etc.
4860                                          */
4861
4862                                         bool do_copy = true;
4863
4864                                         for (vector<string>::iterator v = do_not_copy_extensions.begin(); v != do_not_copy_extensions.end(); ++v) {
4865                                                 if ((from.length() > (*v).length()) && (from.find (*v) == from.length() - (*v).length())) {
4866                                                         /* end of filename matches extension, do not copy file */
4867                                                         do_copy = false;
4868                                                         break;
4869                                                 }
4870                                         }
4871
4872                                         if (!saveas.copy_media && from.find (peakfile_suffix) != string::npos) {
4873                                                 /* don't copy peakfiles if
4874                                                  * we're not copying media
4875                                                  */
4876                                                 do_copy = false;
4877                                         }
4878
4879                                         if (do_copy) {
4880                                                 string to = Glib::build_filename (to_dir, from.substr (prefix_len));
4881
4882                                                 info << "attempting to make directory/folder " << to << endmsg;
4883
4884                                                 if (g_mkdir_with_parents (Glib::path_get_dirname (to).c_str(), 0755)) {
4885                                                         throw Glib::FileError (Glib::FileError::IO_ERROR, "cannot create required directory");
4886                                                 }
4887
4888                                                 info << "attempting to copy " << from << " to " << to << endmsg;
4889
4890                                                 if (!copy_file (from, to)) {
4891                                                         throw Glib::FileError (Glib::FileError::IO_ERROR,
4892                                                                                                    string_compose(_("\ncopying \"%1\" failed !"), from));
4893                                                 }
4894                                         }
4895                                 }
4896
4897                                 /* measure file size even if we're not going to copy so that our Progress
4898                                    signals are correct, since we included these do-not-copy files
4899                                    in the computation of the total size and file count.
4900                                 */
4901
4902                                 GStatBuf gsb;
4903                                 g_stat (from.c_str(), &gsb);
4904                                 copied += gsb.st_size;
4905                                 cnt++;
4906
4907                                 double fraction = (double) copied / total_bytes;
4908
4909                                 bool keep_going = true;
4910
4911                                 if (saveas.copy_media) {
4912
4913                                         /* no need or expectation of this if
4914                                          * media is not being copied, because
4915                                          * it will be fast(ish).
4916                                          */
4917
4918                                         /* tell someone "X percent, file M of N"; M is one-based */
4919
4920                                         boost::optional<bool> res = saveas.Progress (fraction, cnt, all);
4921
4922                                         if (res) {
4923                                                 keep_going = *res;
4924                                         }
4925                                 }
4926
4927                                 if (!keep_going) {
4928                                         throw Glib::FileError (Glib::FileError::FAILED, "copy cancelled");
4929                                 }
4930                         }
4931
4932                 }
4933
4934                 /* copy optional folders, if any */
4935
4936                 string old = plugins_dir ();
4937                 if (Glib::file_test (old, Glib::FILE_TEST_EXISTS)) {
4938                         string newdir = Glib::build_filename (to_dir, Glib::path_get_basename (old));
4939                         copy_files (old, newdir);
4940                 }
4941
4942                 old = externals_dir ();
4943                 if (Glib::file_test (old, Glib::FILE_TEST_EXISTS)) {
4944                         string newdir = Glib::build_filename (to_dir, Glib::path_get_basename (old));
4945                         copy_files (old, newdir);
4946                 }
4947
4948                 old = automation_dir ();
4949                 if (Glib::file_test (old, Glib::FILE_TEST_EXISTS)) {
4950                         string newdir = Glib::build_filename (to_dir, Glib::path_get_basename (old));
4951                         copy_files (old, newdir);
4952                 }
4953
4954                 if (saveas.include_media) {
4955
4956                         if (saveas.copy_media) {
4957 #ifndef PLATFORM_WINDOWS
4958                                 /* There are problems with analysis files on
4959                                  * Windows, because they used a colon in their
4960                                  * names as late as 4.0. Colons are not legal
4961                                  * under Windows even if NTFS allows them.
4962                                  *
4963                                  * This is a tricky problem to solve so for
4964                                  * just don't copy these files. They will be
4965                                  * regenerated as-needed anyway, subject to the
4966                                  * existing issue that the filenames will be
4967                                  * rejected by Windows, which is a separate
4968                                  * problem (though related).
4969                                  */
4970
4971                                 /* only needed if we are copying media, since the
4972                                  * analysis data refers to media data
4973                                  */
4974
4975                                 old = analysis_dir ();
4976                                 if (Glib::file_test (old, Glib::FILE_TEST_EXISTS)) {
4977                                         string newdir = Glib::build_filename (to_dir, "analysis");
4978                                         copy_files (old, newdir);
4979                                 }
4980 #endif /* PLATFORM_WINDOWS */
4981                         }
4982                 }
4983
4984                 _path = to_dir;
4985                 set_snapshot_name (saveas.new_name);
4986                 _name = saveas.new_name;
4987
4988                 if (saveas.include_media && !saveas.copy_media) {
4989
4990                         /* reset search paths of the new session (which we're pretending to be right now) to
4991                            include the original session search path, so we can still find all audio.
4992                         */
4993
4994                         if (internal_file_cnt) {
4995                                 for (vector<string>::iterator s = old_search_path[DataType::AUDIO].begin(); s != old_search_path[DataType::AUDIO].end(); ++s) {
4996                                         ensure_search_path_includes (*s, DataType::AUDIO);
4997                                         cerr << "be sure to include " << *s << "  for audio" << endl;
4998                                 }
4999
5000                                 /* we do not do this for MIDI because we copy
5001                                    all MIDI files if saveas.include_media is
5002                                    true
5003                                 */
5004                         }
5005                 }
5006
5007                 bool was_dirty = dirty ();
5008
5009                 save_default_options ();
5010
5011                 if (saveas.copy_media && saveas.copy_external) {
5012                         if (bring_all_sources_into_session (boost::bind (&Session::save_as_bring_callback, this, _1, _2, _3))) {
5013                                 throw Glib::FileError (Glib::FileError::NO_SPACE_LEFT, "consolidate failed");
5014                         }
5015                 }
5016
5017                 saveas.final_session_folder_name = _path;
5018
5019                 store_recent_sessions (_name, _path);
5020
5021                 if (!saveas.switch_to) {
5022
5023                         /* save the new state */
5024
5025                         save_state ("", false, false, !saveas.include_media);
5026
5027                         /* switch back to the way things were */
5028
5029                         _path = old_path;
5030                         _name = old_name;
5031                         set_snapshot_name (old_snapshot);
5032
5033                         (*_session_dir) = old_sd;
5034
5035                         if (was_dirty) {
5036                                 set_dirty ();
5037                         }
5038
5039                         if (internal_file_cnt) {
5040                                 /* reset these to their original values */
5041                                 config.set_audio_search_path (old_config_search_path[DataType::AUDIO]);
5042                                 config.set_midi_search_path (old_config_search_path[DataType::MIDI]);
5043                         }
5044
5045                 } else {
5046
5047                         /* prune session dirs, and update disk space statistics
5048                          */
5049
5050                         space_and_path sp;
5051                         sp.path = _path;
5052                         session_dirs.clear ();
5053                         session_dirs.push_back (sp);
5054                         refresh_disk_space ();
5055
5056                         /* ensure that all existing tracks reset their current capture source paths
5057                          */
5058                         reset_write_sources (true, true);
5059
5060                         /* creating new write sources marks the session as
5061                            dirty. If the new session is empty, then
5062                            save_state() thinks we're saving a template and will
5063                            not mark the session as clean. So do that here,
5064                            before we save state.
5065                         */
5066
5067                         if (!saveas.include_media) {
5068                                 _state_of_the_state = StateOfTheState (_state_of_the_state & ~Dirty);
5069                         }
5070
5071                         save_state ("", false, false, !saveas.include_media);
5072
5073                         /* the copying above was based on actually discovering files, not just iterating over the sources list.
5074                            But if we're going to switch to the new (copied) session, we need to change the paths in the sources also.
5075                         */
5076
5077                         for (SourceMap::const_iterator i = sources.begin(); i != sources.end(); ++i) {
5078                                 boost::shared_ptr<FileSource> fs = boost::dynamic_pointer_cast<FileSource> (i->second);
5079
5080                                 if (!fs) {
5081                                         continue;
5082                                 }
5083
5084                                 if (fs->within_session()) {
5085                                         string newpath = make_new_media_path (fs->path(), to_dir, new_folder);
5086                                         fs->set_path (newpath);
5087                                 }
5088                         }
5089                 }
5090
5091         } catch (Glib::FileError& e) {
5092
5093                 saveas.failure_message = e.what();
5094
5095                 /* recursively remove all the directories */
5096
5097                 remove_directory (to_dir);
5098
5099                 /* return error */
5100
5101                 return -1;
5102
5103         } catch (...) {
5104
5105                 saveas.failure_message = _("unknown reason");
5106
5107                 /* recursively remove all the directories */
5108
5109                 remove_directory (to_dir);
5110
5111                 /* return error */
5112
5113                 return -1;
5114         }
5115
5116         return 0;
5117 }
5118
5119 static void set_progress (Progress* p, size_t n, size_t t)
5120 {
5121         p->set_progress (float (n) / float(t));
5122 }
5123
5124 int
5125 Session::archive_session (const std::string& dest,
5126                           const std::string& name,
5127                           ArchiveEncode compress_audio,
5128                           bool only_used_sources,
5129                           Progress* progress)
5130 {
5131         if (dest.empty () || name.empty ()) {
5132                 return -1;
5133         }
5134
5135         /* save current values */
5136         bool was_dirty = dirty ();
5137         string old_path = _path;
5138         string old_name = _name;
5139         string old_snapshot = _current_snapshot_name;
5140         string old_sd = _session_dir->root_path();
5141         string old_config_search_path[DataType::num_types];
5142         old_config_search_path[DataType::AUDIO] = config.get_audio_search_path ();
5143         old_config_search_path[DataType::MIDI]  = config.get_midi_search_path ();
5144
5145         /* ensure that session-path is included in search-path */
5146         bool ok = false;
5147         for (vector<space_and_path>::const_iterator sd = session_dirs.begin(); sd != session_dirs.end(); ++sd) {
5148                 if ((*sd).path == old_path) {
5149                         ok = true;
5150                 }
5151         }
5152         if (!ok) {
5153                 return -1;
5154         }
5155
5156         /* create temporary dir to save session to */
5157 #ifdef PLATFORM_WINDOWS
5158         char tmp[256] = "C:\\TEMP\\";
5159         GetTempPath (sizeof (tmp), tmp);
5160 #else
5161         char const* tmp = getenv("TMPDIR");
5162         if (!tmp) {
5163                 tmp = "/tmp/";
5164         }
5165 #endif
5166         if ((strlen (tmp) + 21) > 1024) {
5167                 return -1;
5168         }
5169
5170         char tmptpl[1024];
5171         strcpy (tmptpl, tmp);
5172         strcat (tmptpl, "ardourarchive-XXXXXX");
5173         char*  tmpdir = g_mkdtemp (tmptpl);
5174
5175         if (!tmpdir) {
5176                 return -1;
5177         }
5178
5179         std::string to_dir = std::string (tmpdir);
5180
5181         /* switch session directory temporarily */
5182         (*_session_dir) = to_dir;
5183
5184         if (!_session_dir->create()) {
5185                 (*_session_dir) = old_sd;
5186                 remove_directory (to_dir);
5187                 return -1;
5188         }
5189
5190         /* prepare archive */
5191         string archive = Glib::build_filename (dest, name + ".tar.xz");
5192
5193         PBD::ScopedConnectionList progress_connection;
5194         PBD::FileArchive ar (archive);
5195         if (progress) {
5196                 ar.progress.connect_same_thread (progress_connection, boost::bind (&set_progress, progress, _1, _2));
5197         }
5198
5199         /* collect files to archive */
5200         std::map<string,string> filemap;
5201
5202         vector<string> do_not_copy_extensions;
5203         do_not_copy_extensions.push_back (statefile_suffix);
5204         do_not_copy_extensions.push_back (pending_suffix);
5205         do_not_copy_extensions.push_back (backup_suffix);
5206         do_not_copy_extensions.push_back (temp_suffix);
5207         do_not_copy_extensions.push_back (history_suffix);
5208
5209         vector<string> blacklist_dirs;
5210         blacklist_dirs.push_back (string (peak_dir_name) + G_DIR_SEPARATOR);
5211         blacklist_dirs.push_back (string (analysis_dir_name) + G_DIR_SEPARATOR);
5212         blacklist_dirs.push_back (string (dead_dir_name) + G_DIR_SEPARATOR);
5213         blacklist_dirs.push_back (string (export_dir_name) + G_DIR_SEPARATOR);
5214         blacklist_dirs.push_back (string (externals_dir_name) + G_DIR_SEPARATOR);
5215         blacklist_dirs.push_back (string (plugins_dir_name) + G_DIR_SEPARATOR);
5216
5217         std::map<boost::shared_ptr<AudioFileSource>, std::string> orig_sources;
5218         std::map<boost::shared_ptr<AudioFileSource>, float> orig_gain;
5219
5220         set<boost::shared_ptr<Source> > sources_used_by_this_snapshot;
5221         if (only_used_sources) {
5222                 playlists->sync_all_regions_with_regions ();
5223                 playlists->foreach (boost::bind (merge_all_sources, _1, &sources_used_by_this_snapshot), false);
5224         }
5225
5226         // collect audio sources for this session, calc total size for encoding
5227         // add option to only include *used* sources (see Session::cleanup_sources)
5228         size_t total_size = 0;
5229         {
5230                 Glib::Threads::Mutex::Lock lm (source_lock);
5231                 for (SourceMap::const_iterator i = sources.begin(); i != sources.end(); ++i) {
5232                         boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (i->second);
5233                         if (!afs || afs->readable_length () == 0) {
5234                                 continue;
5235                         }
5236
5237                         if (only_used_sources) {
5238                                 if (!afs->used()) {
5239                                         continue;
5240                                 }
5241                                 if (sources_used_by_this_snapshot.find (afs) == sources_used_by_this_snapshot.end ()) {
5242                                         continue;
5243                                 }
5244                         }
5245
5246                         std::string from = afs->path();
5247
5248                         if (compress_audio != NO_ENCODE) {
5249                                 total_size += afs->readable_length ();
5250                         } else {
5251                                 if (afs->within_session()) {
5252                                         filemap[from] = make_new_media_path (from, name, name);
5253                                 } else {
5254                                         filemap[from] = make_new_media_path (from, name, name);
5255                                         remove_dir_from_search_path (Glib::path_get_dirname (from), DataType::AUDIO);
5256                                 }
5257                         }
5258                 }
5259         }
5260
5261         /* encode audio */
5262         if (compress_audio != NO_ENCODE) {
5263                 if (progress) {
5264                         progress->set_progress (2); // set to "encoding"
5265                         progress->set_progress (0);
5266                 }
5267
5268                 Glib::Threads::Mutex::Lock lm (source_lock);
5269                 for (SourceMap::const_iterator i = sources.begin(); i != sources.end(); ++i) {
5270                         boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (i->second);
5271                         if (!afs || afs->readable_length () == 0) {
5272                                 continue;
5273                         }
5274
5275                         if (only_used_sources) {
5276                                 if (!afs->used()) {
5277                                         continue;
5278                                 }
5279                                 if (sources_used_by_this_snapshot.find (afs) == sources_used_by_this_snapshot.end ()) {
5280                                         continue;
5281                                 }
5282                         }
5283
5284                         orig_sources[afs] = afs->path();
5285                         orig_gain[afs]    = afs->gain();
5286
5287                         std::string new_path = make_new_media_path (afs->path (), to_dir, name);
5288                         new_path = Glib::build_filename (Glib::path_get_dirname (new_path), PBD::basename_nosuffix (new_path) + ".flac");
5289                         g_mkdir_with_parents (Glib::path_get_dirname (new_path).c_str (), 0755);
5290
5291                         if (progress) {
5292                                 progress->descend ((float)afs->readable_length () / total_size);
5293                         }
5294
5295                         try {
5296                                 SndFileSource* ns = new SndFileSource (*this, *(afs.get()), new_path, compress_audio == FLAC_16BIT, progress);
5297                                 afs->replace_file (new_path);
5298                                 afs->set_gain (ns->gain(), true);
5299                                 delete ns;
5300                         } catch (...) {
5301                                 cerr << "failed to encode " << afs->path() << " to " << new_path << "\n";
5302                         }
5303
5304                         if (progress) {
5305                                 progress->ascend ();
5306                         }
5307                 }
5308         }
5309
5310         if (progress) {
5311                 progress->set_progress (-1); // set to "archiving"
5312                 progress->set_progress (0);
5313         }
5314
5315         /* index files relevant for this session */
5316         for (vector<space_and_path>::const_iterator sd = session_dirs.begin(); sd != session_dirs.end(); ++sd) {
5317                 vector<string> files;
5318
5319                 size_t prefix_len = (*sd).path.size();
5320                 if (prefix_len > 0 && (*sd).path.at (prefix_len - 1) != G_DIR_SEPARATOR) {
5321                         ++prefix_len;
5322                 }
5323
5324                 find_files_matching_filter (files, (*sd).path, accept_all_files, 0, false, true, true);
5325
5326                 static const std::string audiofile_dir_string = string (sound_dir_name) + G_DIR_SEPARATOR;
5327                 static const std::string videofile_dir_string = string (video_dir_name) + G_DIR_SEPARATOR;
5328                 static const std::string midifile_dir_string  = string (midi_dir_name)  + G_DIR_SEPARATOR;
5329
5330                 for (vector<string>::const_iterator i = files.begin (); i != files.end (); ++i) {
5331                         std::string from = *i;
5332
5333 #ifdef __APPLE__
5334                         string filename = Glib::path_get_basename (from);
5335                         std::transform (filename.begin(), filename.end(), filename.begin(), ::toupper);
5336                         if (filename == ".DS_STORE") {
5337                                 continue;
5338                         }
5339 #endif
5340
5341                         if (from.find (audiofile_dir_string) != string::npos) {
5342                                 ; // handled above
5343                         } else if (from.find (midifile_dir_string) != string::npos) {
5344                                 filemap[from] = make_new_media_path (from, name, name);
5345                         } else if (from.find (videofile_dir_string) != string::npos) {
5346                                 filemap[from] = make_new_media_path (from, name, name);
5347                         } else {
5348                                 bool do_copy = true;
5349                                 for (vector<string>::iterator v = blacklist_dirs.begin(); v != blacklist_dirs.end(); ++v) {
5350                                         if (from.find (*v) != string::npos) {
5351                                                 do_copy = false;
5352                                                 break;
5353                                         }
5354                                 }
5355                                 for (vector<string>::iterator v = do_not_copy_extensions.begin(); v != do_not_copy_extensions.end(); ++v) {
5356                                         if ((from.length() > (*v).length()) && (from.find (*v) == from.length() - (*v).length())) {
5357                                                 do_copy = false;
5358                                                 break;
5359                                         }
5360                                 }
5361
5362                                 if (do_copy) {
5363                                         filemap[from] = name + G_DIR_SEPARATOR + from.substr (prefix_len);
5364                                 }
5365                         }
5366                 }
5367         }
5368
5369         /* write session file */
5370         _path = to_dir;
5371         g_mkdir_with_parents (externals_dir ().c_str (), 0755);
5372 #ifdef LV2_SUPPORT
5373         PBD::Unwinder<bool> uw (LV2Plugin::force_state_save, true);
5374 #endif
5375         save_state (name);
5376         save_default_options ();
5377
5378         size_t prefix_len = _path.size();
5379         if (prefix_len > 0 && _path.at (prefix_len - 1) != G_DIR_SEPARATOR) {
5380                 ++prefix_len;
5381         }
5382
5383         /* collect session-state files */
5384         vector<string> files;
5385         do_not_copy_extensions.clear ();
5386         do_not_copy_extensions.push_back (history_suffix);
5387
5388         blacklist_dirs.clear ();
5389         blacklist_dirs.push_back (string (externals_dir_name) + G_DIR_SEPARATOR);
5390
5391         find_files_matching_filter (files, to_dir, accept_all_files, 0, false, true, true);
5392         for (vector<string>::const_iterator i = files.begin (); i != files.end (); ++i) {
5393                 std::string from = *i;
5394                 bool do_copy = true;
5395                 for (vector<string>::iterator v = blacklist_dirs.begin(); v != blacklist_dirs.end(); ++v) {
5396                         if (from.find (*v) != string::npos) {
5397                                 do_copy = false;
5398                                 break;
5399                         }
5400                 }
5401                 for (vector<string>::iterator v = do_not_copy_extensions.begin(); v != do_not_copy_extensions.end(); ++v) {
5402                         if ((from.length() > (*v).length()) && (from.find (*v) == from.length() - (*v).length())) {
5403                                 do_copy = false;
5404                                 break;
5405                         }
5406                 }
5407                 if (do_copy) {
5408                         filemap[from] = name + G_DIR_SEPARATOR + from.substr (prefix_len);
5409                 }
5410         }
5411
5412         /* restore original values */
5413         _path = old_path;
5414         _name = old_name;
5415         set_snapshot_name (old_snapshot);
5416         (*_session_dir) = old_sd;
5417         if (was_dirty) {
5418                 set_dirty ();
5419         }
5420         config.set_audio_search_path (old_config_search_path[DataType::AUDIO]);
5421         config.set_midi_search_path (old_config_search_path[DataType::MIDI]);
5422
5423         for (std::map<boost::shared_ptr<AudioFileSource>, std::string>::iterator i = orig_sources.begin (); i != orig_sources.end (); ++i) {
5424                 i->first->replace_file (i->second);
5425         }
5426         for (std::map<boost::shared_ptr<AudioFileSource>, float>::iterator i = orig_gain.begin (); i != orig_gain.end (); ++i) {
5427                 i->first->set_gain (i->second, true);
5428         }
5429
5430         int rv = ar.create (filemap);
5431         remove_directory (to_dir);
5432
5433         return rv;
5434 }
5435
5436 void
5437 Session::undo (uint32_t n)
5438 {
5439         if (actively_recording()) {
5440                 return;
5441         }
5442
5443         _history.undo (n);
5444 }
5445
5446 void
5447 Session::redo (uint32_t n)
5448 {
5449         if (actively_recording()) {
5450                 return;
5451         }
5452
5453         _history.redo (n);
5454 }